Sorry if this is a long post. I have these dark rings around what apper to be rough spots in my plaster. I also have what look like runs down the side of my pool in multiple areas. They seem to be a rust color but not for sure. I tried scrubbing them with a chlorine tab and a vitamin c tab. Niether changed there appearance. I post two picture one is of the rings and the other is a poor shot of what look like runs. Hopefully you can see them. My current readings are as follows
FC 10.5
TC 10.82
PH 7.7
TA 84
CH 495
CYA 50
Iron .1
Copper .3
Phosphates 628
TDS 5000
I am at a loss. I dont want to try and rectify my problem without having an idea of what it is. Any help would be greatly appreciated. I only use liquid chlorine, baking soda and muriatic acid. I have cartridge filters and am in Arizona so water temp is around 90 degrees.
FC 10.5
TC 10.82
PH 7.7
TA 84
CH 495
CYA 50
Iron .1
Copper .3
Phosphates 628
TDS 5000
I am at a loss. I dont want to try and rectify my problem without having an idea of what it is. Any help would be greatly appreciated. I only use liquid chlorine, baking soda and muriatic acid. I have cartridge filters and am in Arizona so water temp is around 90 degrees.
