i have a strange problem with my filter system. every day or so it will start to blow bubbles and small amounts of sand out of the return.
when i turn of the pump to try to fix it, all the water blows out of my skimmer (blowing the basket straight up in the air) and the low wall
suction. i then have to get all the water back in the lines to prime the pump.
this is making my water dirty very often, and i used to have no problem keeping the water clean, has any one ever experienced this?
any help is greatly appreciated, thanks.