I have a approx 12,000 gallon in ground fiberglass pool and having more problems this year trying to get the water clear and balanced. I have been switching chemical products base off different reviews and opinions and still with problems. I test my water with the K-2006 test kit and reading are as followed: free chlorine 1.5, combined chlorine 3.0, ph 7.0, alkalinity 80, calcium hardness 270, CYA reading < 30. Initially when the pool was installed it was filled with my well water and since have been always problems with metal staining on the walls, I have done as natural chemistry stain free in the past and this year with excellent results and then followed by adding metal free routinely but when trying to balance other levels and maintaining the chlorine (shocking) the walls have become stained ago. Also up until this year I never had to add water to the pool but with No rain and the heat I had to add about 2-3" of my well water again. My pool company began my pool using the 3" tricolor tablets - #2 tablets in my automatic feeder weekly with weekly shocking. This year I initially stopped the tablets due to learning how acid they are and switch to granulated chlorine (sodium diclor). To start the pool I used natural chemistry instant conditioner, I have treated the pool with Phos free and weekly pool perfect / Phos free by natural chemistry. I have been using hth algae guard and clarifier, separating dosing of them from the metal free by few days. Last night I added hth ultimate shock treatment - 1 bag (56calcium hypochlorite) and added two 3" tablets to the automatic feeder, this morning walls and water are brownish green stained. Wondering if possible to get pool clear and maintain non stained pool wall or should I have pool drained and filled with non well water. Any help will be greatly appreciated, thank you.