We've had this thing since late October. We've had to drain it 3 times. We just drained it like 3 weeks ago and it's again all nasty inside - scum and it always has a lot of foam. Just can't figure it out. Chems are good. After we get out we put a powder in that is supposed to keep the water clear. The inside of where the filters are is gross. It's full of scum-like substance. We cannot figure it out.
The water is kept at 101 and the lid on when not in use. Husband checks the chems very regularly.
Any thoughts? I don't know what info to provide.