Yes, they do. We have used them successfully in well water pools high in iron for over 30 years. The current formulation is for sand filters/glass media filters. They can be used in a situation with a cartridge filter, but Read More …
Yes, they do. We have used them successfully in well water pools high in iron for over 30 years. The current formulation is for sand filters/glass media filters. They can be used in a situation with a cartridge filter, but Read More …