Recent content by Rich G

Interesting. I actually thought about taking some coarse sandpaper to the stains to see what happens.

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I’ve had it in alignment with the chart or much higher since I cleaned these stains last time. That said, I’m gonna let these soak for another day or two and then run the FC levels at like 20 for a few weeks to cook these stains.

Plaster was new in 2017 so about five and a half years. I want to believe it’s algae but never once been able to get a color off these stains and everything I read says I should get green or black residue. I am afraid it will keep occurring which is really disappointing. I had a pool guy come by...

So I drained the water down to the shelf again to expose some of the stains and treat them again. After soaking in LC all day yesterday the stains are disappearing again. I cannot get any residue or anything when scraping at these

Thanks.. I am pretty positive it’s not algae…it doesn’t really look like all the pictures I see online and I can’t pick at It with a brush, a pick, a knife, nothing. it just slowly gets darker over time. It’s the exact same pattern over and over.

Yes, it fits

was able to take a picture under water

So I am at a complete loss now… acid does nothing to these stains and chlorine takes them away but they slowly come back In all the same places. Since the end of December I have maintained my chems as follows FC 8-13 PH 7.4-7.8 TA 80-100 CH 500-550 CYA 80-90 my most recent log this morning was...