I took the top of my filter off to check my sand, since its been over 5 years. unfortunately the white tube moved up like 2 inches. no way to get it back down unless I remove all the sand and put it back in.
So should I just replace all my sand since I have to take it out?
or is there a way to get the laterals and tube back down into the bottom?
so what kind of sand should I replace it with?
this is the filter I have.