Finding the best automatic chlorine feeder depends on your pool size, maintenance preferences, and budget. The Pentair Rainbow 300 stands out as the overall top choice for its reliable performance and ease of use. For those seeking affordability without sacrificing functionality, the XtremepowerUS Inline Chlorinator offers solid value. Meanwhile, the Hayward CL200EF provides a streamlined option for in-line installation. However, buyers often face tradeoffs between capacity, ease of installation, and compatibility. Continue reading for a detailed breakdown of the top options to help you make an informed decision.
Key Takeaways
- The top performers balance capacity, ease of installation, and consistent dosing accuracy.
- Most high-capacity feeders are better suited for larger pools, but may require more complex setup.
- Compatibility with various pool types and existing equipment influences long-term satisfaction.
- Ease of maintenance and refilling often separates more user-friendly models from more complex ones.
- Price varies significantly, with premium models offering greater durability and features, but not always necessary for smaller pools.
More Details on Our Top Picks
Pentair R171016 Rainbow 300 Automatic Pool and Spa Feeder
This model stands out for its fully enclosed system, which minimizes gas escape and simplifies venting—an advantage over the Hayward CL200EF that lacks a sealed lid and omits O-rings, leading to potential leaks. The Rainbow 300’s NSF listing adds confidence in its durability and safety. However, its lack of included unions might complicate installation for some users, and its design is more suited to those who prioritize a clean, enclosed setup. Compared with the XtremepowerUS feeder, this option is more robust and better suited for larger or spa applications, but it may be overkill for small pools. Overall, it makes the most sense for pool owners who value a sealed, low-maintenance system and are willing to handle a slightly more complex install. Pros: Fully enclosed design, NSF listed, no escaping gases, durable construction. Cons: No included unions, slightly more complex installation.
Verdict: Ideal for pool owners needing a reliable, enclosed feeder that minimizes gas escape, and willing to handle a professional setup.- Weight: 3 Pounds
- System: Completely enclosed, no venting required
- Certifications: NSF listed
- Design: No gases escape
- Installation: Unions not included
Pros:- Fully enclosed design minimizes gas escape
- NSF listed for safety and durability
- No escaping gases during operation
- Robust construction suitable for large pools or spas
Cons:- Unions not included, may require additional fittings
- More complex installation process
Best for: Pools or spas where a sealed, gas-tight system is a priority, and owners comfortable with more involved installation.
Not ideal for: Homeowners seeking a quick, no-fuss setup without the need for unions or enclosed systems.
- Weight:3 Pounds
- System:Fully enclosed, no venting
- Certifications:NSF Listed
- Gas escape:No gases escape
- Unions:Not included
- Application:Pool and Spa
Bottom line: Best suited for experienced pool owners who prioritize safety and a sealed system for their pool or spa.
XtremepowerUS Inline Automatic Chlorinator Chemical Chlorine Feeder for Above Ground Pool, Inground Swimming Pool Chlorine Dispenser Tablet in-line Auto Chlorinator 3-Inch (Compatible with Cl200)
This pick makes the most sense for pool owners who want straightforward installation and easy chemical regulation, comparable to the Hayward CL200EF but with a simple dial control. The 9-pound capacity and adjustable dial allow precise control over chlorine release, making it ideal for small to medium pools. Compared to the Hayward, this model is more user-friendly with its dial control, but it does lack the sealed enclosure of the Rainbow 300, which could lead to chemical fumes escaping in some setups. Its UV-resistant resin construction ensures longevity under harsh sunlight. However, it may be less suitable for larger pools where higher flow rates are required, and it’s designed for inline installation, which might be tricky for some DIYers. Overall, this is best for pool owners who prioritize simplicity and ease of chemical dosing. Pros: Easy installation, adjustable dial control, UV resistant, 9 lb capacity. Cons: Not enclosed, limited for large pools, may require some plumbing skills.
Verdict: Perfect for owners seeking a simple, adjustable inline chlorinator for small to medium pools.- Weight: 3.9 Pounds
- Capacity: 9 lbs
- Material: UV-resistant ABS resin
- Adjustability: Dial control for rate regulation
- Compatibility: Cl200, other 3-inch tablets
- Installation: Inline, in-line return line
Pros:- Adjustable dial control for precise dosing
- Resistant to UV and sunlight
- Large 9 lb capacity for extended use
- Simple inline installation
Cons:- No enclosure, fumes may escape
- Limited capacity for large pools
- Requires plumbing skills for installation
Best for: Small to medium pool owners who want an easy-to-adjust, straightforward chlorination setup.
Not ideal for: Owners with large pools or those requiring enclosed systems to contain fumes and gases.
- Weight:3.9 Pounds
- Capacity:9 lbs
- Material:UV-resistant ABS
- Control:Dial control valve
- Compatibility:3-inch tablets
- Application:Above ground/in-ground pools
Bottom line: Ideal for pool owners who want easy, adjustable chlorine dosing in a simple inline design for small to medium pools.
CL200 Inline Chlorinator Replacement for Hayward CL200EF Chlorine Feeder, Inground Pool Inline Automatic Chlorinator Feeder, High-Grade ABS Material, Easy to Use (2 O-Rings)
This product makes the most sense for pool owners needing a direct replacement for their existing Hayward CL200EF, especially since it is designed for easy installation with the same specifications. It features high-grade ABS material and comes with 2 O-rings for a secure seal, but it’s noted that the original Hayward feeder often lacks O-rings on the lid, which could make this replacement less effective if not installed properly. Compared to the Hayward CL200EF, this replacement offers comparable build quality at a lower price point, but it may lack the advanced sealing features of more expensive models like the Rainbow 300. It’s best for users who want a straightforward, affordable replacement without additional features. Its simplicity may be a drawback if your pool requires a sealed, gas-tight system. Pros: Easy to install, includes 2 O-rings, high-grade ABS, budget-friendly. Cons: Basic design, may not fully seal if lid is missing O-rings, limited to replacement use.
Verdict: Great for replacing a broken or worn-out Hayward CL200EF with minimal fuss and cost.- Weight: Not specified
- Material: High-grade ABS
- O-Rings: 2 included
- Design: Compatibility with Hayward CL200EF
- Application: Replacement for in-ground pools
- Installation: Easy, direct replacement
Pros:- Easy installation as a direct replacement
- Includes 2 O-rings for sealing
- High-grade ABS construction
- Cost-effective option
Cons:- Basic design, may lack a proper seal if original lid is missing O-rings
- Limited features beyond replacement
- Not suitable for large or high-flow pools
Best for: Pool owners needing a simple, affordable replacement for their Hayward CL200EF feeder.
Not ideal for: Owners seeking a sealed, gas-tight system or a more advanced feeder with enclosure features.
- Material:High-grade ABS
- O-Rings:2 included
- Compatibility:Hayward CL200EF
- Application:In-ground pools
- Weight:Not specified
- Design:Replacement
Bottom line: Best for owners replacing their Hayward feeder with a reliable, low-cost part for small to medium pools.
Hayward Automatic Chlorine Feeder, 9lbs, in-Line (incl Mounting Base) (Open Line) CL200EF
This model is best suited for pool owners who want a trusted, proven brand with a large capacity and straightforward installation. It features a durable ABS body, an X-Ring seal for long life, and an easy-Lok threaded cover for quick access—features similar to the Hayward CL200EF. The open-line design allows direct inline installation, which is ideal for in-ground pools, but it lacks the enclosed system of the Rainbow 300, making it more susceptible to fumes escaping, especially if not properly sealed. Its 9-pound capacity makes it suitable for larger pools, but some users have noted that the O-rings on the lid are missing from the original models, so replacing with this may require additional sealing steps. Overall, it offers reliable performance for those who prefer a well-known brand and straightforward setup. It is less suited for owners requiring a sealed, gas-tight system. Pros: Trusted brand, large capacity, easy-Lok cover, durable ABS body. Cons: Open line design, potential for fumes to escape, not enclosed.
Verdict: Best for pool owners who want proven, reliable performance with easy installation for large pools.- Weight: 4 Pounds
- Capacity: 9 lbs
- Material: ABS
- Seal Type: X-Ring
- Design: In-line, open line
- Installation: Inline with mounting base
Pros:- Trusted brand with proven performance
- Large 9 lb capacity
- Durable ABS construction
- Easy-Lok threaded cover
Cons:- Open line design, fumes may escape
- Less suitable for enclosed or spa setups
- Potential missing O-rings on lid requiring extra sealing
Best for: In-ground pool owners seeking a large-capacity, reliable brand with simple inline installation.
Not ideal for: Owners who prefer sealed systems or have concerns about fumes escaping in enclosed spaces.
- Weight:4 Pounds
- Capacity:9 lbs
- Material:ABS
- Seal:X-Ring
- Design:In-line, open line
- Installation:Inline with mounting base
Bottom line: Ideal for owners of large in-ground pools needing reliable, high-capacity chlorination from a well-known manufacturer.
Hayward CL2002S In-line Automatic Chemical Feeder
This product makes the most sense for pool owners who want an easy-to-install, compatible in-line feeder for both above-ground and in-ground pools. Its design emphasizes simple, reliable operation with a finger-release catch for added security, and it accommodates large or small, slow-dissolving tablets, similar to the CL200EF models. The ABS construction ensures durability, and the dial control valve allows for straightforward flow adjustment. However, some users report that the design, while user-friendly, may lack advanced sealing features, making it less suitable for enclosed or gas-sensitive setups. It’s best for those seeking a simple, compatible replacement that integrates seamlessly into their existing plumbing. It is less appropriate for high-flow or enclosed systems where fumes must be contained. Pros: Easy installation, compatible with multiple pool types, adjustable flow, durable ABS. Cons: Basic sealing, limited advanced features, may not fully contain fumes.
Verdict: Suitable for owners needing a reliable, easy-to-install inline feeder compatible with many pools.- Weight: Not specified
- Application: Above-ground and in-ground pools
- Material: ABS
- Flow Adjustment: Dial control valve
- Capacity: Not specified
- Design: Inline with secure finger-release catch
Pros:- Simple, easy installation
- Compatible with various pool types
- Adjustable flow rate
- Durable ABS body
Cons:- Basic sealing, potential fumes escape
- Limited advanced features
- Not suited for enclosed or spa use
Best for: Pool owners wanting a compatible, easy-to-install inline feeder for both above-ground and in-ground pools.
Not ideal for: Owners requiring enclosed, gas-tight systems or high-flow applications.
- Weight:Not specified
- Application:Above-ground and in-ground pools
- Material:ABS
- Flow Control:Dial control
- Capacity:Not specified
- Design:Inline with finger-release catch
Bottom line: Best for pool owners looking for a straightforward, compatible inline chemical feeder with adjustable flow.
Pentair R171096 Rainbow 320 Automatic in-Line Chlorine/Bromine Feeder for Pool and Spa
This model stands out for its seamless in-line installation, requiring no special venting, which makes it ideal for both new and existing pools. Compared to the Hayward CL200, it offers a larger capacity to hold 11 large or 98 small tablets, supporting pools from 6,500 to 70,000 gallons. Its durable construction with PVC fittings ensures long-term reliability, though the setup might be less flexible for above-ground pools. The simple design and robust sealing reduce leaks, but the permanent in-line placement limits mobility. This feeder is perfect for pool owners seeking a low-maintenance, reliable in-line solution that integrates directly into the return line. However, it involves a more permanent installation, which can be a drawback for those wanting portability or less invasive setups.
Pros:- No special venting required for installation
- Large capacity to hold 11 large tablets or 98 small tablets
- Durable PVC fittings and corrosion-resistant construction
- Supports a wide range of pool sizes up to 70,000 gallons
Cons:- Requires permanent in-line installation, limiting mobility
- Limited flexibility for above-ground pools or portable setups
- No detailed technical specs available, which could be a concern for precise sizing
Best for: Homeowners with in-ground pools or spas looking for a durable, high-capacity automatic feeder.
Not ideal for: Above-ground pool owners who prefer portable or no-in-line solutions, as installation is permanent.
- Capacity:11 large or 98 small bromine/trichlor tablets
- Installation Type:In-line, permanent
- Supports Pool Size:6,500–70,000 gallons
- Fittings Included:2″ slip PVC, adapters for 1-1/2″
- Material:PVC, corrosion-resistant
- Venting:No special venting required
Bottom line: This feeder makes the most sense for pool owners seeking a sturdy, high-capacity in-line system with long-term reliability.
This pick stands out for its straightforward design and universal compatibility, making it ideal for both above ground and in-ground pools. Compared to the Pentair Rainbow 320, it offers a more modest 9-lb capacity, suitable for smaller to medium pools. Its double-reinforced thermoplastic construction provides excellent UV and corrosion resistance, though its capacity is somewhat limited for larger pools. The adjustable output dial facilitates precise chlorine or bromine dosing, but the manual controls require some attention to maintain optimal flow. This feeder is best for pool owners new to automation seeking an affordable, easy-to-install in-line solution. Still, its smaller capacity and basic features mean it might not be ideal for very large or heavily chlorinated pools.
Pros:- Universal 2-inch inlet and outlet connections
- Adjustable 360° output dial for precise control
- Constructed with UV and corrosion-resistant thermoplastic
- Compatible with both bromine and chlorine tablets
Cons:- Limited capacity of 9 lbs, not ideal for large pools
- Basic design with no advanced features or digital controls
- No detailed technical specs available for sizing or flow rate
Best for: Pool beginners or owners of small to medium pools seeking an affordable, easy-to-use in-line feeder.
Not ideal for: Owners of large pools or those requiring high-capacity feeders, as the 9-lb capacity may be insufficient.
- Capacity:9 lbs
- Connections:2 inch inlet and outlet
- Material:Thermoplastic
- Adjustment:360° dial
- Supports:Chlorine and Bromine
- Application:Above ground & inground pools
Bottom line: This feeder suits pool owners who want a simple, reliable in-line chlorinator at an affordable price, especially for small to medium pools.
320 Automatic in-Line Pool Chlorine/Bromine Feeder for In-Ground & Above Ground Pools and Spas, Adjustable Flow Control for Max 70000 Gallons, Replacement R171096 R17-1096
This model provides a direct replacement for R171096, with high compatibility for large pools up to 70,000 gallons. Compared to the Hayward CL200, it offers a broader flow support, making it suitable for very large pools or spas. Its upgraded sealing with widened gaskets and thickened O-rings enhances water-tightness, reducing leaks over time. The adjustable control valve allows precise chlorine dissolution, supporting both bottom and top feed modes, ideal for pools with extensive circulation systems. Made of durable, chemical- and UV-resistant ABS, it withstands harsh environments. While installation is straightforward, the size and capacity make it best for owners with large pools who need a robust, high-capacity feeder. The downside is that its size and complexity may be daunting for smaller setups.
Pros:- Supports pools up to 70,000 gallons
- Upgraded sealing with widened gaskets and thickened O-rings
- Adjustable flow control for precise dosing
- Made of durable chemical- and UV-resistant ABS
Cons:- Size and complexity may be excessive for small pools
- Installation may be more involved due to size
- Lack of detailed technical flow rate specifications
Best for: Owners of large in-ground pools or spas requiring high-volume, durable chlorination solutions.
Not ideal for: Owners of small or above-ground pools with limited space or lower capacity needs, due to its large size and capacity.
- Capacity:Supports 6,500–70,000 gallons
- Material:Chemical- and UV-resistant ABS
- Flow Adjustment:Yes, adjustable control valve
- Sealing:Widened gaskets, thickened O-rings
- Compatibility:In-ground & above ground pools
- Installation:In-line, direct replacement
Bottom line: This feeder is ideal for large pools or spas that demand high capacity and robust sealing, despite its bigger size.
XtremepowerUS Automatic Chlorinator Feeder for Above Ground Pools & In-Ground Swimming Pools Off-Line Chlorine Tablets Bromine Dispenser Holds 9LBS Includes Installation Kit
This off-line chlorinator is designed for pools with limited space or where inline installation isn’t feasible. It connects to the piping system, minimizing water flow restrictions, and is fully adjustable via a dial control valve. Compared to the in-line models like the Hayward CL200, it offers more flexibility for above ground pools, although its capacity of 9 lbs suits smaller pools. The heavy-duty resin construction enhances durability, but the hose length of only 8 feet can be limiting, requiring additional purchase for longer connections. Its off-line setup makes it easier to install and maintain, but the manual adjustment may require frequent oversight for optimal chlorine levels. This makes it ideal for pool owners seeking a portable, easy-to-install solution, but not for those with large or heavily chlorinated pools.
Pros:- Off-line, connects to piping with minimal flow restriction
- Fully adjustable dial control valve
- Heavy-duty resin construction resists corrosion and UV
- Includes installation kit for easy setup
Cons:- Limited capacity of 9 lbs, less suitable for large pools
- Hose length only 8 feet, which may require extensions
- Manual adjustment may need frequent monitoring
Best for: Above ground or small in-ground pool owners needing a portable, off-line chlorinator with adjustable flow.
Not ideal for: Owners of large pools or those needing high-capacity feeders, due to its 9 lb capacity and hose length limitations.
- Capacity:9 lbs
- Connection Type:Off-line, pipe connection
- Hose Length:8 feet
- Material:Heavy-duty resin
- Adjustment:Dial control valve
- Application:Above ground & small in-ground pools
Bottom line: This off-line feeder offers flexibility and ease of installation for owners of small or above ground pools, though capacity limits its use for larger systems.
R171096 Pool Chlorinator, 320 Automatic in-Line Chlorine/Bromine Feeder Compatible with Rainbow 320
This chlorinator stands out for its wide capacity range, supporting pools from 6,500 to 70,000 gallons, making it a versatile choice for both small spas and large inground pools. Its compatibility with Rainbow 320 and Pentair R171096 models ensures a straightforward replacement, which is a significant advantage over the more limited capacity of the Hayward CL200EF. The design emphasizes safety with a fully enclosed system that prevents contact with tablets, and its adjustable flow control allows precise dosing without manual intervention. Compared with smaller models like the Rainbow 300, this unit handles more tablets and larger volumes, but this comes with a bulkier size and slightly more complex installation. The low-maintenance features—such as a bottom drain and durable ABS construction—are major pluses for busy pool owners. However, its size and installation complexity may be overkill for small or infrequently used pools. For those seeking a dependable, high-capacity feeder that minimizes manual monitoring, this pick makes the most sense.
Pros:- Supports large pools up to 70,000 gallons, ideal for big setups
- Fully enclosed system enhances safety for families with children and pets
- Adjustable flow control for precise chemical dosing
- Durable ABS construction resists corrosion and wear
Cons:- Installation can be complex for DIY users due to size and fittings
- Bulkier design may be cumbersome in tight spaces
- Higher initial cost compared to smaller models
Best for: Pool owners with large, high-volume pools or spas who need a reliable, high-capacity automatic feeder.
Not ideal for: Homeowners with small pools or spas who prefer a compact, simple solution, as this unit is bulky and more complex to install.
- Capacity Range:6,500–70,000 gallons
- Supported Tablets:up to 11 large or 98 small tablets
- Material:High-quality ABS
- Installation:Supports both bottom and top feed
- Flow Control:Adjustable control valve
- Compatibility:Compatible with Rainbow 320 and Pentair R171096
- Safety Features:Fully enclosed, dual O-ring seal, pressure vent
- Maintenance:Includes bottom drain for easy cleaning
- Warranty:12 months
Bottom line: This feeder is best suited for large pools needing consistent, safe, and adjustable chemical delivery despite its bulk and installation complexity.
How We Picked
I evaluated these automatic chlorine feeders based on key criteria that matter to pool owners: performance consistency, ease of installation, build quality, capacity, and overall value. I prioritized products with proven reliability, straightforward setup, and maintenance simplicity, as these factors directly impact daily pool management. The ranking reflects a balance between price and features, ensuring that both budget-conscious buyers and those seeking premium options find suitable choices. Products were compared for compatibility with different pool sizes and types, as well as feedback on durability and user experience from available reviews and specifications.Factors to Consider When Choosing Best Automatic Chlorine Feeder
Choosing the best automatic chlorine feeder involves considering several important factors that go beyond basic features. Understanding your pool size, chlorine demand, and existing equipment helps narrow options effectively. Additionally, evaluating installation requirements and maintenance routines can prevent future frustrations. Here are key considerations to keep in mind:Pool Size and Capacity
Matching the feeder’s capacity to your pool volume is essential. Larger pools require feeders with higher capacity to avoid frequent refilling, while smaller pools can opt for more compact models. Overestimating capacity can lead to unnecessary costs, whereas underestimating may result in inconsistent chlorine levels. Always check the manufacturer’s recommended pool size to ensure compatibility.
Compatibility and Installation
Some feeders are designed for in-line installation, fitting directly into your pool’s plumbing, while others are off-line units that connect externally. Consider your existing setup and whether you prefer a simple plug-and-play model or a more integrated solution. Proper installation is vital for reliable operation, so look for models with clear instructions or included installation kits.
Ease of Refilling and Maintenance
Frequent refilling can be a hassle, especially with small-capacity feeders. Opt for models that allow easy access to the chlorine tablets or pellets, with minimal disassembly. Durability of parts and resistance to corrosion are also important, particularly in outdoor environments exposed to weather and pool chemicals.
Durability and Material Quality
Investing in a feeder with high-quality materials like ABS plastic or corrosion-resistant metals ensures longevity. Cheaper models may degrade quickly, leading to leaks or failure. Consider the reputation of the brand and customer reviews regarding long-term performance, especially if you plan to keep the unit for multiple seasons.
Price and Value
While budget models can suffice for small or infrequently used pools, investing in a more durable, feature-rich feeder pays off in reliability and fewer headaches. Balance your budget with the features you need, and remember that paying more upfront can save money on replacements or repairs later on. Look for models offering good warranties and customer support as part of their value proposition.
Frequently Asked Questions
How often do I need to refill an automatic chlorine feeder?
The refill frequency depends on the capacity of the feeder and your pool’s chlorine demand. Smaller units may require refilling every 1-2 weeks, while larger models can last longer between refills. Monitoring chlorine levels regularly helps determine when to top up, ensuring your pool remains sanitized without over-chlorination. Keep in mind that external factors like weather and pool usage also influence how quickly the chlorine depletes.
Can I use any type of chlorine tablets with these feeders?
Most automatic feeders are compatible with standard stabilized chlorine tablets, but it’s important to check the manufacturer’s specifications. Some models are optimized for specific tablet sizes or types, such as trichlor or dichlor tablets. Using incompatible tablets can cause clogging or improper dosing, so verifying compatibility before purchase helps avoid operational issues.
Are automatic chlorine feeders suitable for all pool types?
While most feeders work well with both in-ground and above-ground pools, compatibility can vary depending on the plumbing and size of the pool. In-line feeders are typically easier to integrate into existing plumbing for in-ground pools, whereas off-line units are more flexible for above-ground pools. Always check the product specifications to ensure it suits your pool type and volume.
What maintenance is required for an automatic chlorine feeder?
Regular maintenance involves cleaning the feeding mechanism and checking for clogs or leaks. It’s also important to replace worn O-rings and inspect the chlorine tablets for degradation. Periodic calibration may be necessary to ensure accurate dosing. Keeping the unit clean and free of debris helps maintain consistent chlorine levels and extends its lifespan.
Is it better to choose a manual or automatic chlorine feeder?
An automatic feeder provides consistent chlorine levels with minimal effort, ideal for busy pool owners or those who want reliable sanitation. Manual dosing offers more control but requires daily attention and can lead to inconsistent chlorination, especially if you forget to add tablets regularly. For most users seeking convenience and peace of mind, an automatic feeder is the smarter choice, especially for larger or heavily used pools.
Conclusion
The best overall pick for most pool owners is the Pentair Rainbow 300, thanks to its reliable performance and straightforward operation. For those on a budget, the XtremepowerUS Inline Chlorinator offers excellent value without sacrificing core functionality. If you prefer a premium, durable model with advanced features, the Hayward CL200EF or similar high-end units are worth considering. Beginners or those with smaller pools should prioritize simplicity, while large or complex setups benefit from higher-capacity, robust models. Match your pool size, installation preferences, and budget to find the perfect fit to keep your pool pristine with minimal fuss.
