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Your cart is empty.This is a dry granular product that increases the total hardness in pool water to the recommended range.Test for calcium hardness with a reliable test kit. The desired range for calcium hardness is as follows: Vinyl Pools: 200-300 ppm, Tile and Exposed Aggregate Pools: 200-400 ppm, Marcite, Fiberglass or Painted Pools: 250-400 ppm. If the calcium hardness tests less than the desired range, add this product according to the included chart. Place this product into a plastic bucket already filled with swimming pool water. Do this in a ration of up to 2 pounds of product per approximate 5-gallon bucket of water. Slowly pour this solution around the perimeter of the swimming pool while the circulating system is operating. In a 10,000 gallon pool, do not add more than 10 pounds of this product per 2 hour period.
Barbi
2025-09-04 14:32:32
Needed for our pool. Great price point compared to big box store or pool supply. Follow the instructions with no shortcuts.
Maria
2025-08-23 16:06:25
Good value
Scrabble Lovers
2025-06-13 09:25:25
This worked well in my in-ground cement / plaster pool and resulted in the expected increase in calcium per the label, same as other more expensive calcium increasers from local pool store. It also dissolved just as well as other calcium increasers I've used. The label on this product advises to add by sprinkling it over the pool. That worked fine - the particles that dropped to the bottom were dissolved within a minute or two. The label on the pool store increasers suggest pre-dissolving in a bucket, in increments. That pre-dissolving method also worked well with this Pool Mate product. I suspect the reason for recommending the sprinkling method (versus pre-dissolving) is some concern about splashing the dissolving liquid into one's eyes, since the water does naturally heat up during this exogenic process of dissolving the calcium. So the "sprinkling" method is probably the safest for the user. I also calculated the amount of calcium increase expected based on the weight of calcium added and my pool size - result was exact. Use the chart on the product or have more fun with the "poolmath" area in the forum at troublefreepool.com. I'm very happy with this Pool Mate calcium product.
Angel M.
2025-04-04 18:59:11
Fast delivery and works perfectly.
Dwinkjr
2025-02-12 10:11:44
Tired of your pool throwing tantrums in the form of cloudy water and mysterious stains? Well, say goodbye to those poolside blues with Pool Mate Calcium Hardness Increaser! This little miracle worker is like a superhero for your pool, protecting it from corrosion and etching while keeping the water crystal clear. Just a sprinkle of this magic powder will boost your calcium levels, preventing those unsightly stains and keeping your pool's surface smooth and sparkling. Plus, it's super easy to use – just toss it in and watch your pool transform into a happy, healthy oasis. So ditch the stress and embrace the power of Pool Mate Calcium Hardness Increaser – your pool will thank you for it!
JExizian
2025-01-20 10:40:40
Very good price
Dbeech411
2025-01-12 18:54:56
Shipped fast. Just as described.
Robert P. Tripi
2025-01-07 15:06:36
It did the job. Had 10lbs left over or next time.
Ward Smith
2025-01-05 16:30:15
Works fine. Best price I found.
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