I have an above ground pool, roughly 8000 gallons with a good size sand filter and pump.
I have been having a problem for a while, I take the water to be tested at the pool supply store and everything looks good on the test except the FC doesn't show. Even though I just shocked the pool the day before.
every time I have the water tested it shows 0 chlorine every time. and the test strips never show chlorine either.
It seems I have to keep a lot of chlorine in the pool just to keep the algae from forming. I have even tried using a lot more shock than I should and still nothing
please help with my chlorine problem? thanks