When I vacuum to waste, due to the irregular shape of my 14,000 gl lagoon pool, I lose at least 3 inches of water, and that's if I hustle. I'm thinking of setting up a cistern to catch it and feed back the clean water to my pool.
If I were to use a 55 gallon plastic barrel (food quality of course) and run my waste line with a diesel filter bag attached to the end and pump that water into the barrell, and let it fill up to the ~30 gallon mark, would that let the dead nasties settle to the bottom, thus having clear water on top? I could either drill and tap a spillover that would run back into the pool (filtered again at the spillover) roughly 12" below the top of the barrel, or just use a sump pump and garden hose to pull water from the top of the barrel.
Has anyone ever tried anything like this before I waste a lot of time and wife-head shaking?