Why is my pool bottom becoming “splotchy”

fluff

0
Feb 16, 2014
13
Texas
Pool is 3 years old. Liquid chlorine only. This seems to be creeping from the deep end towards the shallow end. In Texas on well water…

Any help is appreciated!

(Maybe posted in wrong place, my apologies)
 

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I can't tell what are splotches from the reflections in the pictures.

Are the "splotches" dark spotting or white spotting on the blue plaster?

Dark spotting maybe metal staining.

White spotting maybe a common plaster problem.


 
Being on well water it could be iron staining.

Crush up some vitamin C tablets, put them in a sock, and rub them on some of the splotches and see what happens.
 
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