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Thread: pH Test More Yellow Than Red

  1. Back To Top    #1

    Join Date
    Feb 2009
    North East Thailand

    pH Test More Yellow Than Red

    I try to keep my Ph level at 7.5 but just lately when testing the solution in the Ph section of the test tube turns yellow instead of red. The water is clear, no hint of Algae, it looks fine but taste a little funny. The Chlorine level is good. I have added soda ash to the prescribed level but this has made no difference. Does anyone have any help or advice.
    Mike Court
    In ground Pool size 12m x 5m x 1.3m av
    Concrete construction with tiled base and sides
    750 Sand Filter
    1.5k Pump
    I don't have a skimmer, around the perimeter of the pool is a plastic grate above a concrete channel that directs overflow into holding tank.

  2. Back To Top    #2
    y_not's Avatar
    Join Date
    Jul 2012
    Redmond, OR

    Re: Ph Preference

    I'm assuming it's more yellow than 7.2/7.0 on the color comparator?
    Are you using the R-0014/R-0004 phenol red pH reagent, and not OTO?

    Thanks for reading... - Tony
    Da' Pool: Intex 15'x42" 3284gal AGP EasySet (Inflatable Ring) - (Summer 2014: 27' round EW /w 6.5' deep end @ 22,500gal)
    Pump & Cart Mod: 1000gph Cart. 5ft² - 2 nylons, 24/7 OP. Traps bugs/bits, lasts longer/cleans easier = Happier Pool Owner!!
    The Bible for a "Trouble Free Pool" life = PoolSchool, the BBB method a TF100 test kit(Recommend Kits Compared). - Cleaning a Sand Filter
    Water looks like GLASS, if yours doesn't...SLAM IT! Feels nice and never been happier!!! :D

  3. Back To Top    #3

    In the Industry

    Donldson's Avatar
    Join Date
    Jun 2009
    NW Ohio

    Re: pH Test More Yellow Than Red

    A full set of test results would help us narrow down what the cause is.

    Did this happen overnight or gradually over a few days?
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
    Pool School - PoolMath - HIGHLY Recommended Test Kits

  4. Back To Top    #4

    Re: pH Test More Yellow Than Red

    I'm curious to know what your TA is. Can you post complete test results?
    17,000 inground gunite pool finished June 2013. Pentair variable speed something or another. Polaris cleaner, inline rainbow chlorinator. Using trichlor until CYA reaches 50-60.

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