Poolife® MPT Extra™ 21lbs
Product Overview
A multi-functional 3-inch chlorinating tablet designed to sanitize, prevent algae, and control scale in a single step.
In our experience, Poolife® MPT Extra™ 21lbs tablets are a proven choice for homeowners running outdoor pools who want to simplify their maintenance routine. Formulated with Trichloro-s-Triazinetrione: 93.5%, Copper sulfate pentahydrate: 1.5%, these slow-dissolving 3-inch tablets deliver built-in stabilizer to protect against UV degradation while simultaneously controlling algae and scale. Available in 4 lbs, 11 lbs, and 21 lbs containers, this 21 LB bucket provides a long-lasting supply of multi-functional chlorine to keep your water clear and balanced.
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This all-in-one proprietary 3″ tablet sanitizes, prevents algae, staining and scaling while clarifying and softening pool water. Also protects against chlorine loss caused by direct sunlight, so you can swim in a beautiful pool all summer long.
Stabilized Chlorine Tablet
Poolife MPT Extra is a stabilized chlorine tablet that protects against UV degradation, ensuring longer-lasting chlorine levels to keep your pool water clean and sanitized.
Contains Algaecide and Water Clarifier
Poolife MPT Extra contains an algaecide and water clarifier, offering added protection against algae growth while improving water clarity. This dual-action formula ensures a sparkling, crystal-clear pool with every use.
Automatic Feeder Compatible
Poolife MPT Extra is compatible with automatic feeders, allowing for easy and consistent chlorine distribution. It also delivers algaecide and clarifier benefits, simplifying comprehensive pool care.
Watch every cleaning mode
Manufacturer-supplied feature clips.
Benefits & What Makes It Different
Dual-Action Sanitizer & Algaecide
Formulated with Trichloro-s-Triazinetrione: 93.5%, Copper sulfate pentahydrate: 1.5% to sanitize water and prevent algae growth simultaneously.
Built-In UV Stabilizer
Contains stabilizer to protect free chlorine from being rapidly degraded by intense sunlight, reducing overall chemical loss.
Scale and Stain Control
Includes proprietary additives that help prevent mineral scaling and staining, keeping pool surfaces and equipment clean.
Product Details
Trichloro-s-Triazinetrione: 93.5%, Copper sulfate pentahydrate: 1.5%
1 tablet (approx. 7 oz) per 10,000 gallons of pool water weekly to maintain 1–3 ppm free chlorine.
Compatibility
- Compatible with floaters, skimmers, and automatic chlorinators.
- Do not mix directly with calcium hypochlorite or any other pool chemicals to avoid dangerous reactions.
- Maintain pH 7.2–7.6 and total alkalinity 80–120 ppm for optimal performance.
When To Use This
Pro Tip
In hot climates where sunlight burns chlorine faster, maintaining your cyanuric acid at 30–50 ppm is crucial. However, because trichlor tablets continuously add stabilizer, monitor your CYA levels monthly; if they exceed 50 ppm, temporarily switch to a non-stabilized chlorine like calcium hypochlorite to avoid chlorine lock.
Common Questions & Instructions
How many Poolife MPT Extra tablets do I need for my pool?
For routine sanitization, add one 3-inch tablet per 10,000 gallons of pool water weekly, or as needed to maintain a constant free chlorine level of 1–3 ppm.
Does Poolife MPT Extra contain cyanuric acid?
Yes, these tablets contain stabilizer. To prevent chlorine lock, keep cyanuric acid 30–50 ppm. For overall balance, maintain free chlorine 1–3 ppm, pH 7.2–7.6, total alkalinity 80–120 ppm, calcium hardness 200–400 ppm, and salt 2700–3400 ppm if running a hybrid system.
Can I use these tablets in my skimmer basket?
Yes, Poolife MPT Extra tablets are compatible with skimmers, floaters, and automatic feeders, but never mix them directly with other chemical types in the same feeder.
Delivered today to your DFW neighborhood
Order this item by 2 PM Central on a weekday, and we'll have it on your driveway by evening. Same-day delivery is FREE to every ZIP in our DFW coverage area — no minimum — or it's free with our weekly service plan.
