My pool surface has always had white chalky staining, so much of it that it wasn't clear what the true quartz french grey color was supposed to look like for the first 2 years of ownership. The pool was put in as part of a new home build, and there were too many issues to deal with in parallel to figure out what was going on. Both the home builder and the pool subcontractor were absolutely "see no evil" silent on this, telling me that it was "a natural material" and variation was expected. I gradually learned more and realized I'd signed a "builder has no liability" (to summarize) contract on the pool. YOYO.
The hazy, patchy staining has gradually improved with careful management of the CSI. A big improvement came with installation of intelliPH in year 3, which delivers small doses of acid all day as the chlorine generator runs. Otherwise in summer when water is in the 80s for months, and evaporation increases pool Ca, pH can rise significantly during the day. I now can see the actual quartz color coming into view, in patches of the floor and walls, between the stains. So I know what direction I need to go.
However, beginning maybe 6 mo after build, what I now know are Ca nodules began to appear. They are small thin teardrops/icicles, always white, and easily scraped off with a fingernail when smaller or with a putty knife if allowed to get bigger. There are small white patches on the pool floor.
I know I have a less-than-perfect install; there are good TFP threads about what is a Ca nodule and this video (
) has a good explanation and includes examples of core sampling of the pool wall. I know a combination of acid and scrubbing works, I've cleaned off a few areas on some plastered steps, but its slow and labor intensive. What I'm worried about is that a whole pool acid wash might open up the nodules (bad) while clearing the surface staining (good). I'm caught between the rocks (nodules) and the hard places (surface stain)! Has anyone tried the treatment offered by poolstainremoversdotcom? Is it safer than acid and effective? Other suggestions welcome.
Ed
The hazy, patchy staining has gradually improved with careful management of the CSI. A big improvement came with installation of intelliPH in year 3, which delivers small doses of acid all day as the chlorine generator runs. Otherwise in summer when water is in the 80s for months, and evaporation increases pool Ca, pH can rise significantly during the day. I now can see the actual quartz color coming into view, in patches of the floor and walls, between the stains. So I know what direction I need to go.
However, beginning maybe 6 mo after build, what I now know are Ca nodules began to appear. They are small thin teardrops/icicles, always white, and easily scraped off with a fingernail when smaller or with a putty knife if allowed to get bigger. There are small white patches on the pool floor.
I know I have a less-than-perfect install; there are good TFP threads about what is a Ca nodule and this video (
Ed