I've been ill and the pool has been neglected. I have had a solar cover on it about a month. I kept the pump on low or off most of the time- to aid raising the temperature. The temp is 87 and its wonderful, but the stains are back worse than before. The white parts of the pool-steps, returns, drain, etc. are rusty colored. Should I have been adding a routine dose of sequestering agent? Do I just start all over with the treatment to remove it? If I put in ascorbic acid without a sequestering agent, won't the stains come right back again? I thought they were metal stains, but could they be something else? Thanks for your help again.
Ph 7.0
FC 2.
CC.0
cya 10 (?)