Redbone2874 Posted January 29, 2011 Report Share Posted January 29, 2011 Ok, here is my situation I just changed my water I had yellow flakes when I drained it and when I was filling it up they returned. I got rid of them. I added my Calcium Hardness Increaser, Chlorine and my Shock l let some hours pass came back to it and my pH is at 8.0 this is the first time this has happen for me usually I can balance this all out quite well. I figured just let it all settle down come back to it tomorrow. I tested it today and it is still at an 8.0 I added about 6 ozs of Sodium Bisulfate in 1 oz measurements and it still haven't moved. What is going on? What can I add to it to bring it down? I'm out of Sodium Bisulfate, is there anything that works better? My numbers are Cl is 5, TA 90, Calcium 350, and CYA is at 30. Quote Link to comment Share on other sites More sharing options...
JerimiahR Posted January 29, 2011 Report Share Posted January 29, 2011 If your TA is 90 you should have no problem getting your pH below 8.0. However, if your fill water began with a TA higher than that, the Alkalinity in the water will absorb any of the Sodium Bisulfate you add until it (the TA) lowers. High TA buffers the pH and allows it to resist acids. Now that your TA is good you should see your pH settle and react to your pH Decreaser. Quote Link to comment Share on other sites More sharing options...
Redbone2874 Posted January 29, 2011 Author Report Share Posted January 29, 2011 I just need to keep on dumping sodium bisulfate in it huh? I just thought I was dumping a lot in it without it doing anything. Quote Link to comment Share on other sites More sharing options...
waterbear Posted January 29, 2011 Report Share Posted January 29, 2011 I added my Calcium Hardness Increaser, Chlorine and my Shock l let some hours pass came back to it and my pH is at 8.0 this is the first time this has happen for me usually I can balance this all out quite well. I figured just let it all settle down come back to it tomorrow. I tested it today and it is still at an 8.0 I added about 6 ozs of Sodium Bisulfate in 1 oz measurements and it still haven't moved. What is going on? What can I add to it to bring it down? I'm out of Sodium Bisulfate, is there anything that works better? My numbers are Cl is 5, TA 90, Calcium 350, and CYA is at 30. First how are you testing? Second, what was the FC reading when you tested pH. High sanitizer levels can give you a false high reading on pH because of chemical interference and with some test kits this can be with FC as low as 3 ppm! Better test kits can handle FC levels up to around 10 ppm before the results are not accurate. Third, how many gallons is your spa? Quote Link to comment Share on other sites More sharing options...
Redbone2874 Posted January 30, 2011 Author Report Share Posted January 30, 2011 With a DPD tester, FC is at 5, and 500 gals Quote Link to comment Share on other sites More sharing options...
waterbear Posted January 30, 2011 Report Share Posted January 30, 2011 With a DPD tester, FC is at 5, and 500 gals Specifically, which kit? Some of the Guardex and Pentair kits have a problem with pH tests when the FC is above 3 ppm Quote Link to comment Share on other sites More sharing options...
Redbone2874 Posted January 30, 2011 Author Report Share Posted January 30, 2011 No I got it at Leslie's Pool supply the # 81-330 Quote Link to comment Share on other sites More sharing options...
Redbone2874 Posted January 30, 2011 Author Report Share Posted January 30, 2011 I Think that I might have it I just tested it again and it is at 7.4. Quote Link to comment Share on other sites More sharing options...
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