There is some sand (or what we think is sand) on the bottom of my pool. When the repairman tried to backwash through the sand filter, he noticed sand coming back through the returns. He suggested that I may want to ditch the whole sand filter and go with cartridge since there could be internal parts broken.
So my question is, do I think about ditching the equipment and putting in a cartridge filter? or should I just have the sand replaced, maybe with Zeobrite and have the laterals replaced if broken? or should I just go with a cartridge filter?
Just some background info, I just recently brought this house. So far the leaks in the pool have been repaired and the pump replaced. The pool itself is about 20-30 years old. I'm still kind of new to pool ownership but I am learning