High TA & PH - Purple Residue

Problems relating to pH and total alkalinity.
Increase ph, increase TA. Reduce pH, reduce TA.
pH chemistry advice and techniques for the pool.
rlsmith

CYA

Postby rlsmith » Mon 17 Sep, 2007 18:27

Mr. Clean,

I forgot I had CYA test strips. I just tested it and it appears it is reading between 100 and 150 somewhere. So, I'll take your advice and lower the water level and add more.....


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mr_clean
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Postby mr_clean » Mon 17 Sep, 2007 20:08

I would thiink sense you say purple it could be from way to high of CYA in water. I have seen this at different pools before and draining water and replacing is the way to go about fixing it and scrubbing the areas showing purple.
Then once you have CYA at 60-80, you can attack PH/TA levels using aeration method. The heater should be fine having PH low for only a week and I still suggest using a metal remover after CYA is under control.
rlsmith

Postby rlsmith » Tue 18 Sep, 2007 07:28

Are you suggesting draining the whole pool?? I thought you should never totally drain a fiberglass pool. It's 12000 gals. Is backwashing to get it lowered okay? And do I add the water through the skimmer or straight in to the pool? As for scrubbing, it appears to be a residue which comes up easily.
rlsmith

Postby rlsmith » Tue 18 Sep, 2007 07:49

Is it okay to vaccum this stuff up???
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mr_clean
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Postby mr_clean » Tue 18 Sep, 2007 09:18

Only drain 1/4 of pool water and then refill and retest. Scrub, vac, it's all good.

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