White rubbery buildup at waterline?

May 11, 2015
15
Arkansas
Our pool build just wrapped up about 3 weeks ago. I got in tonight for the first time and noticed a white buildup on the waterline tiles. It had a rubbery feel and came off fairly easily when I rubbed it with my fingers. What was it? Calcium?
 
My guess is calcium build up. However, I have never seen it rubbery.

Do you have a recommended test kit yet? If so please post a full set of numbers.

If you could also go to settings and update your signature with your pool and equipment info that would be great.
 
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