Deposits on plaster and mottling of plaster

Total hardness and calcium hardness in pool water.
Scale, calcium buildup, hard water and scaling problems.
nlt999
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Posts: 1
Joined: Thu 18 Apr, 2013 18:19
My Pool: 18,000 gallon, concrete with plaster finish
Location: Scottsdale, AZ

Deposits on plaster and mottling of plaster

Postby nlt999 » Thu 18 Apr, 2013 18:34

Hi!
I drained my 18000 gallon concrete pool that I built myself 7 years ago, to do some maintenance on it. Before draining, I called the company that plastered it and asked about mottling of the blue plaster surface... they said that was not unusual. After draining I found that the originally medium-blue plaster had what looks like white-ish scale on much of it and some drippy-looking white deposits sticking to the sides and white bumps in places on the bottom. The drippy deposits can be removed reasonably easily with a razor blade. I've included photos.

Our water here is very hard and my TDS has been high for a while (about 3000 last checked). I probably should have emptied and refilled the pool sooner. Question now is: Should I acid-wash it? will these deposits cause future problems? Should I do anything else before refilling??

Appreciate any input! Nick
Attachments
White deposits on plaster 3 forum.jpg
This shows some of the white deposits
White deposits on plaster 3 forum.jpg (137.51 KiB) Viewed 1550 times
Taped prior to applying Deck-O-Seal 2 forum.jpg
This shows mottling of plaster
Taped prior to applying Deck-O-Seal 2 forum.jpg (123.36 KiB) Viewed 1547 times


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