I have what appears to be some brown spots. They're not coming up with VitC, I tried that because I recently had an application of fertilizer. I do not generally lose more than 1ppm overnight and never have more than .5 CC.
I decided to SLAM anyway to be sure. I brought it up to 20 FC (50 CYA). Within 3 hrs, FC was down to 12.5, .5 CC. I brought it back up to 20 FC, another 5 hours it's already down to 12 again, 0 CC.
Is it normal to have THAT much FC consumed that quickly and not have any CC?
The spots are not fading.
I decided to SLAM anyway to be sure. I brought it up to 20 FC (50 CYA). Within 3 hrs, FC was down to 12.5, .5 CC. I brought it back up to 20 FC, another 5 hours it's already down to 12 again, 0 CC.
Is it normal to have THAT much FC consumed that quickly and not have any CC?
The spots are not fading.