Poolife® MPT Extra™ 4lbs
Product Overview
A multi-functional 3-inch chlorinating tablet designed to sanitize, prevent algae, and control scale in a single step.
Unlike generic trichlor tabs, Poolife® MPT Extra™ 4lbs (also available in 11 lbs and 21 lbs sizes) is a multi-functional sanitizer formulated with Trichloro-s-Triazinetrione and Copper sulfate pentahydrate at 93.5%, 1.5% concentrations. This slow-dissolving 4 LB container of 3-inch tablets contains a built-in stabilizer to protect your chlorine from UV degradation, while simultaneously clarifying water and preventing algae. It is what pool techs reach for when they want to streamline weekly maintenance without balancing multiple separate additives.
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Benefits & What Makes It Different
Dual-Action Sanitizer & Algaecide
Formulated with 93.5%, 1.5% active ingredients to continuously sanitize and prevent algae growth simultaneously.
Built-In UV Stabilizer
Contains stabilizer to protect free chlorine from being burned off by the sun, reducing chemical loss in hot climates.
Scale and Stain Control
Helps prevent mineral staining and scale buildup while softening pool water for a more comfortable swim.
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, or as needed to maintain 1–3 ppm free chlorine.
Compatibility
- Compatible with floaters, skimmers, and automatic chlorinators.
- DANGER: Do NOT mix directly with other pool chemicals, especially calcium hypochlorite or other chlorinating agents, as this can cause a violent reaction or explosion.
- Ensure water chemistry is balanced: pH 7.2–7.6, total alkalinity 80–120 ppm, and calcium hardness 200–400 ppm before use.
When To Use This
Pro Tip
In hot southern climates, intense sunlight burns chlorine faster, making the built-in stabilizer in these tabs crucial. However, to prevent CYA buildup, occasionally bypass the tabs and shock with a non-stabilized calcium hypochlorite shock to keep your cyanuric acid within the ideal 30–50 ppm range.
Common Questions & Instructions
How many Poolife MPT Extra 3-inch tablets do I need for my pool?
For weekly maintenance, the standard dosing is 1 tablet per 10,000 gallons of pool water to maintain a free chlorine level of 1–3 ppm. Always place these slow-dissolving tablets in a floater, skimmer, or automatic feeder, and never mix them directly with other chemicals.
Does Poolife MPT Extra add cyanuric acid to the water?
Yes, because these tablets contain stabilizer (cyanuric acid), they will gradually raise your CYA levels. We recommend monitoring your cyanuric acid to keep it within the ideal 30–50 ppm range to prevent chlorine lock.
Can I use this 4 LB container in a saltwater pool?
While saltwater pools primarily rely on salt cells to generate chlorine, keeping a 4lbs or 4 lbs container of MPT Extra on hand is a proven choice for supplemental sanitizing during high bather loads or extreme heat waves.
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.
