Our pool is quite old, 15 years or so and has never been resurfaced. We have a bad black algae problem and I've been doing lots of scrubbing with a wire brush. The upshot is, a lot of very fine crystal crete is making its way into the filter grids and clogging them. The maintenance man says backwashing doesn't help, he has to take the filter apart and clean the grids with a hose. Very inconvenient.
The filter is a DE Pentair Pack Fab 60.
Is it time to resurface the pool?
Any way to keep the filter running without clogging?
Today I plan to stir it up quite a bit and pump about 2000 gallons out as wastewater, hoping to suck out as much of the crystal crete as I can in the process.