SO, I tried the test by applying a Vit C tab to 1 of many stains we have ... Yep, metal (iron?) ... Actually, I was quite amazed at just how WHITE the pool surface got so fast. The resdiual small "pit" must be a leaching of a small tiny hole from the underlying gunite. Is that correct? (as a side, why does that doe that?) And generally, as I look at the pool surface/fiberglass underwater with my goggles on, it has a generally-brownish tint .. this vitamin C test DEFINITELY whitened the surface area I applied it to ... So, next step would be a total AA treatment.
questions:
- Would you just wait until next Opening season to do the AA "process", or would you do it NOW before basically shutting down the pool for the year? We're getting close to end of season here in my area. Probably another 2-3 weeks t most with the nights getting into the high 40's. (Our area doesn't actually go to Freezing temps, but we'll just be maintaining proper levels throughout winter.)
- Several years have gone by since the original post on the AA treatment, and a lot of the comments are old. Do the procedures on page 1 still apply? or are there other products to be considered?
- There is discussion about adding a "sequestrant" - what is that???? Several people here asked and I never saw a reply. Is that the Absorbic Acid ?
thanks !