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It is currently May 25th, 2012, 7:44 am
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kgriggs
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Post subject: pH, TA, Bromine reading in new start spa  Posted: August 13th, 2011, 12:55 pm |
Joined: August 1st, 2010, 10:31 am
Posts: 60
Location: Columbia, SC
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I just refilled my spa and started the testing procedure to balance the water. Fought with a high pH and low TA situation for a while. Is there a trick to get this situation under control? I just about have it after multiple dry acid and baking soda additions.
Then before adding anything I thought I would test the bromine/chlorine reading for fun. I had detectable levels prior to adding anything. I assume chlorine in the city water? THen I added a capful of MPS and now i have 2ppm detectedwith oto, 1 ppm detected with DPD, and 4ppm with the FAS-DPD test...
Is this typical? I still have ha hard time grasping the bromine residual and MPS balance issue.
Thanks!
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20K Gal Blue Plaster IG with rock waterfall, Beach Entry, Hayward Goldline Pro Logic controller and SWG,
Sta-Rite System 3 S7M400 cartridge filter, 1-1/2 HP pump, Energy Therm Heat Pump, Nexxus Savi LED lighting
500 Gal Dynasty Miramax Fiberglass Cinema Spa
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chem geek
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Post subject: Re: pH, TA, Bromine reading in new start spa Posted: August 13th, 2011, 7:48 pm |
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Joined: March 28th, 2007, 2:40 pm
Posts: 5410
Location: San Rafael, CA USA
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MPS measures as CC in the DPD test and as FC in the FAS-DPD test (not sure about OTO, but it seems to at least get partly measured there as well). You can get the Taylor K-2042 to remove interference from the MPS.
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16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"
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JamesW
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Post subject: Re: pH, TA, Bromine reading in new start spa Posted: August 13th, 2011, 8:11 pm |
Joined: March 2nd, 2011, 8:02 pm
Posts: 1611
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Is this spa on chlorine or bromine? Have you added any sodium bromide?
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kgriggs
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Post subject: Re: pH, TA, Bromine reading in new start spa Posted: August 20th, 2011, 11:07 am |
Joined: August 1st, 2010, 10:31 am
Posts: 60
Location: Columbia, SC
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The spa is bromine but this was on a fresh fill prior to any addition of bromine.
_________________
20K Gal Blue Plaster IG with rock waterfall, Beach Entry, Hayward Goldline Pro Logic controller and SWG,
Sta-Rite System 3 S7M400 cartridge filter, 1-1/2 HP pump, Energy Therm Heat Pump, Nexxus Savi LED lighting
500 Gal Dynasty Miramax Fiberglass Cinema Spa
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