Quote Originally Posted by gogolion View Post
I do have a pressure gauge but I kind of question if its working properly. It never seems to change. It is always around 19 or 20 psi and never seems to go up. I'm pretty sure it does go down to zero if I turn off my pump.
Make sure it does go to zero. If it IS working, and never goes up, your filter may need more sand.

DE powder is filter powder, diatomaceous earth, used in DE filters. You may be able to get a 5 or 10# bag at a pool store.