OK so how can I figure out what size sand filter is needed. The pool is marcite, aprox. 20,000 gal, no heater. I am guessing it is a 300 lb filter but only guessing by the size of the old one and comparing it to others I have seen. I would look at the label on the old one but cannot get to it to see it. (faces the neighbors fence and not enough room to get in between)
Trying to get a friend to replace his filter or at least clean it. The pool has been there for about 17 yrs, he has owned it for 14 of those. Never has he cleaned the sand or ever replaced it. Have had ongoing algae problems with doing all the right things using the BBB method. My guess is filter needs to be cleaned and replace the sand. He is willing to replace everything, rather than just the sand.