How full should the sand filter be? I know mine kicks some out from time to time, and have heard it can lose 1/4 cup to backwashing.
I have no idea how much I need in there as i took it over from previous owners, they have a bag of sand they left... doesn't say the size on it, but says it is for pools.
ok, it has a 49/20 silica sand.
I can't do a great sand cleaning as no matter what I close, water leaks out a pipe that can't be closed.... but when i opened it, it is just over half way full of sand...