roversson Posted April 25, 2014 Report Share Posted April 25, 2014 I have a 14 year old in ground fiberglass pool which is causing cloudy pool water when you touch the pool wall or agitate the water. It appears that something may be mildly or moderately dissolving the outer surface of the gel coat. I wonder if that could even be possible? If you have seen this in a fiberglass pool, what was the cure, if a cure is known? It is baffling. Quote Link to comment Share on other sites More sharing options...
roversson Posted April 27, 2014 Author Report Share Posted April 27, 2014 Found calcium reading at 120. Anyone know if unbalanced water can etch the fiberglass pool wall? I know that is a real issue with concrete pools, but no concrete here! Quote Link to comment Share on other sites More sharing options...
chem geek Posted April 27, 2014 Report Share Posted April 27, 2014 It is possible if the gel coat contains substantial amounts of calcium carbonate. That's why the rule for fiberglass is "it depends". Also, calcium can help prevent cobalt spotting. However, if the water has been like this for 14 years and it's only now showing signs of deterioration, it may not be the lack of calcium unless that's been a recent change. Quote Link to comment Share on other sites More sharing options...
roversson Posted April 28, 2014 Author Report Share Posted April 28, 2014 This pool was new to me last year. I expect that the calcium has been at a normal level in prior years. No way to know for sure. My main question is whether others have experienced extensive chalking of fiberglass pools and what they found as potential causes and solutions! Experiences welcomed! Quote Link to comment Share on other sites More sharing options...
roversson Posted April 30, 2014 Author Report Share Posted April 30, 2014 Anyone seen a fiberglass pool where the fiberglass was chalking? Quote Link to comment Share on other sites More sharing options...
MO fiberglass Posted July 14, 2014 Report Share Posted July 14, 2014 Did you ever figure out why the pool is chalking? This sounds similar to issue I am having. Quote Link to comment Share on other sites More sharing options...
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