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I will do that. Thanks!

I don't have any stored pool math data. But, yes my MA additions correlate. Before borates I'd add about 12 oz a week or so. Now I'm up to 68 to 80 oz ! per week

Thank you! That's probably it. The new pool plaster. Since I've already got borates in there, I guess I've just wait till it dilutes out and then after the recommended 18 months are up, I'll try the borax again. And thank you for the link to the borate drop test as well. I can never be sure of...

In July 2022, I decided to follow the procedure within TFP to add borax to the pool. My goal was to stabilize pH rises and lower the frequency and amount of muriatic acid that I normally have to add. However, after adding borax I find that I am having to add like 3X to 4X MORE muriatic acid to...

The pool is about 10-11 years old. Original plaster. For the first 9 years I was not monitoring CSI, and had very high CYA from the use of chlor tabs (kept high chlorine and used a bunch of Phos-free to counter algae in the summer). A year ago, I switched to a SWG, got the CYA levels down to...

Thanks for the reply. I was wondering if it could be calcium scale - I had no idea of what it would look like. And, regarding the CSI, I only began paying attention to it over the past year or so after finding this site. I am quite certain the CSI was all out of whack prior to that, for many...

Hey folks I've been battling these stains on and off for about 3 years with little success. As of a year ago I discovered this site and began to test water chemistry weekly, ensuring everything was within acceptable levels. Prior to that (and with chlorine tabs instead of SWG) I would just...