I have an inground fiberglass pool and I am losing water to where I need to replace water once every other day. I talked to a pool service person and he told me to mark the pool at water line and run the pump for 24 hrs and then do the same with pump off.
The thing that worries me is when I put the lever in just the main drain position I get a lot of air bubbles in the basket. When I put it in-between the skimmer and main drain most of the bubbles go away.
The frustrating thing is i put anti freeze in the lines last fall.
If there was a leak in the main drain, could it be plugged and the filtration system run normal? The man at the pool store said some pools are installed with out a main drain,is this right?