Hi Marie,

I have a 22 000 gallon plaster pool which was finished last year in November. Cartridge filter with SWG. My #’s taken with Ben’s kit are below.

CYA 60
PH 7.5
TC 4
FC 4
CC 0
TA 90
Hardness 260-270
Salt 3000 -3200
Temperature 85

We filled the pool from city water delivered by truck. I have never tested the water for Copper or Iron. But I can have it tetsted on the weekend.

I noticed that the brown color of the stains look very similar to the clay which we have here in VA. So I was hoping the stains are just dirt and go away with Acid or a good brush. But they don’t. I applied the acid for around 10 to 15 sec as I don’t know how much the plaster can take.

Thx for any hint you can give me.

Guido