Really helps with water stabilization. We use less chemical stuff when we use these regularly but it does need to be replaced at least every 6 mo the for effectiveness.

Been using this product since my pool was installed in 2017. And having great sparkling clean water.

I purchased a small cabin home last year that has an 18' above ground pool. I didn't know much about pool maintenance but I did know that I didn't want heavy chlorine in it. I tried this Frog product despite it being presented as for inground pools. It didn't fit the skimmer basket so I just tied it to the entry platform near the water inlet and let it dangle about a foot into the water.This Frog worked beautifully for the entire season (fairly short here in Maine), I would say it could easily last six months. The pool water tested perfectly, felt soft and smooth and had no chlorine smell. I occasionally use a non-chlorine pool shock during the season. I only used a heavy chlorine shock when I first opened the pool in May. I plan on using this Frog product again this my second year as a pool owner. I recommend trying this product if you want a mineral based pool sanitizer system.

I have used these for 2 years no, my pool has never looked better. Easy to use, no mess, less chlorine.