Yeah, the plastic sheet method sounds like a nightmare (appreciate the idea though).
Right now I only have the FAS DPD powder/ titrating reagent for checking and keeping the cl at 30. Are you saying once I add the bromine, to let the cl drop to 10?
This is the worst the pool has ever been in 7 years of ownership. Could part of it be that our filters are simply old and no longer performing even though they've recently been cleaned?