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Thread: Results: alk too high?

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  1. #1
    waste is offline PF Support Team Whizbang Spinner waste 3 stars waste 3 stars waste 3 stars
    Join Date
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    Smile Re: Results: alk too high?

    Salinda, if FC + CC doesen't = TC, there is a testing problem, either the reagents are no good or you are reading the results wrong (believe me, I know how hard it can be to compare the colormetric tests at times, judging the variations between the 'given' values vs. your result). If you think that the reagent might be bad, replace it.
    I suspect that the alk is dropping due to airation (do the returns point up?, do you have a 'water feature' that would make the water bubble?), as your pH is 7.0. This is consistant with the alk reduction method advocated here (low pH and some airation will result in the alk steadilly dropping). Also, how low can you test with your kit, if 7.0 is the bottom, it's very possible that the pH is actually lower than 7.0. Go ahead and add the baking soda, it'll raise your alk and also drag the pH up (yes, it's fine for SWCG pools).
    I hope this helps, if you have any further questions or need clarification - don't hesitate to ask. - Waste
    Luv & Luk, Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill libraries

  2. #2
    salinda is offline Lifetime Member Weir Watcher salinda 0
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    Dec 2004
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    Default Re: Results: alk too high?

    My ph kit tests down to 6.8. It is definitely NOT that. It is a little oranger than 7.0, so I am calling it that....

    I will try adding the baking soda....
    Salinda
    owner of ~35,000 gallon plaster IG pool/spa combo. Ikeric Dyna-Miser VS150 filter pump, 2 hp whisperflo spa jet pump, The Pool Cleaner 2x suction cleaner, Clean & Clear Plus 520 cartridge filter, Zodiac Clearwater LM2-40 SWG, Sta-rite 400k heater, solar heat pads and coils.

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