Your pool filter needs to trap dead bugs, bacteria and algae so they can’t hang around making the water cloudy or getting swimmers sick. Pool filter is the stuff that grabs those contaminants.

      All sand have a rough surface where contaminants get caught as the water flows past, then clean water flows back into the pool.

      Pool water flushes through filter sand for several hours every day, so as time goes by, the rushing water wears away the prickly surface of the sand, leaving it smooth and round.  This wears it down into dust, useless for filtering anything.

      Efficient and inexpensive filtration system to maintain water quality is always our goal. You've spent a lot of time and effort to establish aboveground or inground pool with filtration system, and don't want to waste all your time and money just making sure your filter does what it’s supposed to. So, change your pool filter sand in time.