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Thread: PH at 8 ok?

  1. Back To Top    #1

    Join Date
    Sep 2015
    Location
    Wellington
    Posts
    25

    PH at 8 ok?

    Is it ok to keep PH at 8 if CSI is still kept near zero? Would I be causing damage to the pool? It looks like I will have to add 2 Cups of Acid every 2 days to keep my PH down at 7.8. Even if I get away with only doing that 3 times a week, that is 6 Cups/Week or 1.5 Gal/Month. Seems like a lot of Acid. My numbers are:
    TA: 60
    CYA: 70
    Salt: 3400
    CH: 400
    FC: 5.5

    Right now Pool Temp is 85 in morning, 90 in daytime - and that puts my CSI at 0.07 and 0.11 and respectively.

    Thanks again for your help
    Pentair EasyTouch 4, Three 12" Copper Bobe' Scuppers
    Pentiar ScreenLogic Interface w/iPhone App
    Pentair Intelliflo VS Pump, Intellichlor SWG
    Hayward Universal Colorlogic LEDs, Pentair Clean & Clear 200 Filter
    TF Test Kit

  2. Back To Top    #2

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,082

    Re: PH at 8 ok?

    The only issues with the higher pH would be metal staining if you had metals in the water. Of course, it would be hard to maintain that pH unless you could clearly distinguish between 8.0 and 8.2 (or higher) on your test kit. If you find you get more scaling in your salt cell, then you could lower your TA to 50 ppm.

    The aeration from the scuppers is probably the main driving force for the rising pH, but you might also point the return closest to your SWG downwards if the pipe run is short between the SWG and that return. It may be that you are getting undissolved chlorine gas outgassing and that will have the pH rise and lowering your TA or setting a higher pH target won't help with that.
    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"

  3. Back To Top    #3

    Join Date
    Sep 2015
    Location
    Wellington
    Posts
    25

    Re: PH at 8 ok?

    Chem Geek, thanks for the reply. My kit has 7.8 and then 8.2...so if its a little darker than 7.8 I'll consider that OK, if it looks closer to 8.2, I would add Acid.. I wish someone made a kit indicating 8.0 Actually, I think I have some of my returns intentionally pointed towards the surface in an effort to drive surface debris to the skimmer. I guess that was a dumb move giving my PH issues I'll point them lower and maybe that will help and I'll watch the salt cell. Thanks again!
    Pentair EasyTouch 4, Three 12" Copper Bobe' Scuppers
    Pentiar ScreenLogic Interface w/iPhone App
    Pentair Intelliflo VS Pump, Intellichlor SWG
    Hayward Universal Colorlogic LEDs, Pentair Clean & Clear 200 Filter
    TF Test Kit

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