I HAVE HAD TROUBLE SINCE USING THESE . MY CYANURIC ACID LEVELS ARE OUT OF CONTROL . I HAD TO TAKE OUT HALF THE WATER IN MY POOL TWICE SINCE I STARTED USING THESE .

i bought these because they were only ones could find with the shortage. i barely get a reading even after doubling up on the amount i usually use.just horrible

These were a collossal waste of money. As soon as we put them in our feeder for our inground pool, the water became immediately cloudy. Been fighting with it ever since, and to top it off, they dissolve completely about 3 days...terrible.

They work great.....If I could buy some

A couple of these in each intake works great. Maybe a gallon or two of chlorine or two a week.

Very satisfied I Ordered on a Friday got on a Tuesday! Excellent service

have been using all season. WORKS GREAT!

If you're looking for no additional stabilizer in your chlorine this is a good option.

This is the best price I can find. It is individually wrapped also so no complain.

Item # 655393|Model # 12001805, ordered one month ago and have not received any news on when it will be delivered???