Can you run another FAS-DPD test this morning and see what you get?
If your test results are correct, you're going to have to just keep doing what you're doing. Raise FC to 10 and hold it there. CCs will form, but they will be oxidized by the sun and more FC. Eventually everything will come down to where it's supposed it, it will just take awhile.
If your test results are correct, you're going to have to just keep doing what you're doing. Raise FC to 10 and hold it there. CCs will form, but they will be oxidized by the sun and more FC. Eventually everything will come down to where it's supposed it, it will just take awhile.