Doheny's Cartridge Cleaner - 4 x 2 lb. Bottle

I used this product last summer and didn't have to replace a filter. I usually purchase one or two cartridge filters every year. This product restored filters that are 4 yrs old.

This cartridge cleaner is a must for opening my pool in the spring. Lots of algae drawn into filters and it helps cut the slime and clean the filters to be reused.

We are always pleased with the quality of Doheny's products. Although we haven't used this yet since our pool is not open for the season, we do not anticipate any problems.

Did not think it would work, but I wanted to try. To my amazement it did a great job cleaning the filters. I was able to clean 3 filters with one pound of the product.

This product is very effective and shortens my filter cleaning process. I have used this cleaner for many years.

Great stuff for your filter. Cleans it well, and helps the filter to last longer!

Dry water soluble Filter cleaner works well and storage is cleaner.

Soaked elements over 24 hours. No breakdown of contamination occurred. Was very expensive and a waste of money.

Graphic on this advertisement says 1 pound per 5,000 gallons, but it is actually 1 pound per 5 gallons. Thought we were buying a super concentrate!

Ineffective with a filter the size of my filter. This only allows for a five gallon mixture and I need something like GBL Filter Fresh that will do at least 30 gallons.