Recent content by Durable

I've tried 2 or 3 pool services but always ended up with a green pool. I can have a green pool for free. I have a 21,0000 gallon plaster pool with cartridge filters. It has a hot tub. It's also very green. I bought a test kit (TF-100) and here's what I've got: FC: 0 Alkalinity: 100 CYA Test...