Poolife
Poolife Defend+ 1 QT
Best dual-action treatment for pool owners seeking clear, algae-free water.
Keep your pool water crystal clear with Poolife Defend+ 1 QT. This powerful, multi-functional algaecide and clarifier is designed to tackle green, black, and mustard algae, ensuring a pristine swimming environment. Its fast-acting, non-foaming formula clarifies water for improved appearance and is an essential part of the MPT Extra™ System. For simple weekly maintenance, add 1¼ oz. per 10,000 gallons directly to your pool water. The active ingredient is a 20% concentration of Poly Quat & Clarifier, making it an effective solution for a sparkling clean pool.
$33.99
Owner Satisfaction
4.5
/ 5
Category Rank
298
/ 1311
#298 in Pool Cleaners & Chemicals
Price vs Category Average
-50%
Below average
Volume
1
/ QT
Who it's for
- Busy homeowners wanting fewer maintenance tasks throughout the swimming season
- Pool owners needing a versatile solution for stubborn algae outbreaks
- Swimmers who prefer crystal clear water without unsightly surface foam
Who should skip it
- Budget-conscious buyers looking for the most affordable preventative chemical options
- Pool owners who struggle with precise chemical application and balancing
- Beginners who prefer simple, forgiving products that resist accidental overdosing
Performance breakdown
Algae eradication
Potent formula effectively neutralizes green, black, and mustard algae blooms.
Water clarity
Integrated clarifier agents quickly restore sparkle to cloudy pool water.
Application ease
Simple liquid dosing makes weekly maintenance a quick, hassle-free task.
Formula stability
Non-foaming composition ensures no unsightly residue or bubbles after treatment.
System integration
Seamlessly functions as the final step in the MPT Extra system.
Treatment efficiency
High concentration provides significant coverage for large residential pool volumes.
Key Specs
Volume
1 QT
Active ingredient
20% Poly Quat & Clarifier
Product Form
Liquid
Application Method
Add directly to pool water
Dosage
1¼ oz. per 10,000 gallons
Maintenance Interval
Weekly
System Step
Step 3 of 3 in the MPT Extra™ System
Treatment Capacity
256,000 gallons
Features
- Treats and prevents multiple algae types
- Clarifies water for better appearance
- Fast-working, non-foaming formula
- Part of the MPT Extra™ System
- Designed for weekly maintenance
- Easy-to-use liquid form
- Effective algaecide and clarifier
What customers say
Customers overwhelmingly praise Poolife Defend+ for its exceptional reliability in pool maintenance. The powerful, nonfoaming formula consistently prevents and eliminates stubborn algae, including green and mustard varieties. Users value it as a dependable, set it and forget it preventative measure that significantly reduces labor, ensuring crystal clear water even during peak summer heat. While acknowledging the premium price, many loyal customers confirm its superior performance justifies the cost, noting it succeeds where cheaper alternatives fail. Its compatibility with various pool surfaces without causing cloudiness adds to its appeal. The consensus is that this product delivers excellent long term value by guaranteeing consistent clarity, saving time and effort on corrective treatments.
Know before you buy
This formula is designed to tackle green, black, and mustard algae. It acts as both a preventative measure and a treatment to keep your pool water clear.
No, Poolife Defend+ features a non-foaming formula. It is specifically designed to clarify your water without creating unwanted suds or foam on the surface.
For routine maintenance, you should add the product once a week. The recommended dosage is 1¼ oz. per 10,000 gallons of pool water.
No, this specific product is not compatible with saltwater systems. It is intended for use in standard chlorinated pools.
The MPT Extra™ System is a three-step maintenance program designed by Poolife to simplify pool care. While Defend+ serves as the third step, it is formulated to work effectively as part of that specific regimen.
Application is straightforward; you simply pour the required dosage directly into your pool water. Ensure your pump is running to help circulate the product throughout the pool.
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$34