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plaster is a dark gray with a hint of blue.

I don't know if the test kit that came with my pool tests the total hardness? I looked on my pool records and I don't see it there either? The ALK says with adjustment. I think my PH was at or just above 8 at the highest. I added a bucket of calcium per the pool place where i had the pool...

CH .08 TCH .08 PH 7.1 ALK 86 CYA 52 Salt 2200 ( I added 2 bags of salt per the pool place) I have been using strips and drop tests to make sure I am in the correct levels evey other day. Current strip just tested says (good guess since it is not the drop kit.) I do that about once a week. TH...

Here is one more pic.. Mainly on the walls... when origially brushing the plaster 3-4 times a days when pool was installed In JAN. I would brush really hard and got most of this stuff off but it seemd to be there from the 1 st week or so. Pools is 6 months old approx 13K gallons 15x30...

I have what i think might be calcium scaling inmy new pool. I have tried lots of chemicals and nothing has gotten rid of it. I have tried an SOS pad and scrubbed it and gotten it smoother but it still feels a bit like sand paper and looks like little bubbles on the sides of the pool. What do...