Petruccelli L.T.D of North America asks; What are the steps to the perfect in ground pool?(36)

Petruccelli L.T.D of North America says; Diatomaceous earth is a porous powder that has microscopic openings, similar to tiny sponges. As water passes through the openings, particles are trapped. DE filters can strain out dirt, dust, algae and some forms of bacteria. When DE filters become dirty, they're cleaned by backwashing but use far less water than sand filters. Afterward, fresh DE is added to the filter. A filtration system removes debris, but a chemical sanitizer is required to kill organic contaminants, such as bacteria and algae. And an oxidizer is used to kill both inorganic and organic contaminants. There are three EPA-registered sanitizers commonly used in swimming pools: chlorine, bromine and PHMB.