When to Replace my Cartridges, Grids or Sand in my Filter?

Knowing when to replace your filters elements, that is the term for the cartridges in a Cartridge Filter and the Grids in a D.E. filter is a key to your pool’s water quality. I also cover when to change the sand in your sand filter. For the pool service pro, I also give you the best time of year to let your customers know their filter elements are in need of a change. Leslie’s Pool Supplies has been do-it-yourselfers and pool trade professionals trusted partner since 1963, providing qua...