Please help! Have a 15' round above ground pool, 5500 gallons, with a 1 hp pump and Hayward sand filter. This season we replaced both the pump and filter on opening but haven't been able to get it right! Our po cover fell in this winter so we were left with a ton of leaves in the pool, though the water was clear to the bottom, algae overgrowth took over once the cover was off. We've been shocking, algaecide and brushing the sides down but having trouble with the filter. I can get the jets going but within an hour there is barely a trickle coming from the return. Skimmer basket clear, pump filter clear, psi is only up to 14 from 10. I backwash anyways, and het pressure returns but 20 minutes late stops again.
is this a sign to need back washing this often or is there an issue with the pump/filter? I am unable to run the pump 24/7 due to the pressure issue which is preventing me from clearing out the algae!