Thank you! Glad to find this forum! I take care of the pool myself, and sometimes it's hard to find reliable answers. We have a plaster (colored) pool; 35K gal. The sand filter was installed in 2008, previously when we have drained the pool (because of high saturation index), we have rented a submersible pump. There is a main drain in the deep end. The pool was built in 1993. The pool sits at the water table; the deck is actually raised about 2 feet above the ground. There is some sort of mechanism installed at the drain to fill it with ground water if it empties to keep it from "floating."
In 2004, we had the pool replastered. They damaged the built in drain to the caretaker, and the leaf trapper hasn't functioned correctly since then.
I would appreciate any other ideas.
Thanks