Hi all, I noticed last week a little white line along the water line in the pool figured it was calcium?
So I didnt add water for a week and let the water get down a bit. The white really became noticeable on the tile once it dried out.
Any ideas what this is? I tried using muriatic acid and a scotch brite pad and it didn't make a dent.
The white part is not rough to the touch, its almost like it is a film. When it is wet, you can barely see it.
Thanks very much for any help.
PH 7.4 -- (current, but with SWG its spikes constantly.)