Hey guys I'm new to this forum and I'm looking for some help on this issue that I keep having with my pool. We purchase a pool for our kids the summer escapes ring pool 14x36, so the filter that comes with that pool it's a total waste. The guy at Leslie's store told me to get a sand pump filter Intex 1200 GPH krystal Clear sand pump filter. When I leave the filter on overnight, I wake up to the pool with the water half way. I don't see a leak anywhere, what could be causing this?