Quote Originally Posted by squirrel49 View Post
Thanks for the replies so far.

A little more info.


5. Checked my log... Calcium was at 350 when I closed.
Pat.
Your calcium dropped 130 ppm while the pool was closed. I suspect it has deposited as scale, which is often seen as a rough white or tan deposit! Acid and/or abrasive scrubbing will remove it. You said your pH was over 8.0 when you opened. High pH is one of the factors that will cause scaling. You might try dropping your pH to 7.0 for a while to see if it helps redissolve any of it but the only solution might be an acid wash if it is really bad. Anyone else have any ideas on this?