I have a persistent and annoying problem with "sand" not getting filtered out in the catrtrige filter. The sand is probably just the insoluble part of dirt that ends up in the pool. It collects underneath the return jets and in the bottom of the pump basket.
Is there a trick to getting this out? I vacuum it one day, and the next day, it's back in the same spots. Is this just a downside of a cartridge filter?
Is there a trick to getting this out? I vacuum it one day, and the next day, it's back in the same spots. Is this just a downside of a cartridge filter?