I have a small swimming pool for about 40 Goldfish and Koi. I've used those pond filters with sponge type materials to filter out the waste and algae for twenty years, but it has always been a struggle to keep the water clean in the summer. It also took 45 minutes to an hour to clean all of the sponges with a hose several times a week. This year, when the weather turned warm, those filters just couldn't keep up with the algae. I decided to order a Vevor 16" sand filter. I bought both sand and cellulose for it. It took about a week for the water to fully clear, but now I backwash for a minute, once or twice a day, and the water stays clear. What a difference! And the fish act energetic and lively. I wish I had done this twenty years ago.
kekoa0100 
Sam Humston 
Bill 
