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Thread: Messed up pool chemistry...Help!

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    garden:nut's Avatar
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    Messed up pool chemistry...Help!

    Over the summer of last year I used the BBB method but have been using the chlorine pucks over the winter because of work/school. We recently had a problem with yellow/green algae in our pool. The pool store told us to use the "No More Problems" and told us how much to add. Well my husband added some and the next day I added some not knowing he did too, by mistake. Lets just say, we messed up and added too much . This was 2.5 weeks ago and we are still having to shock our pool every 2-3 days to keep the chlorine level up. The water looks good, the algae is gone, but the water feels horrible, and makes our skin really dry. Here are our results.

    Taylor
    Cl/Br 3/6
    Ph 7.2
    TF-100
    FC 1.5
    CC 0.5
    TC 2
    TA 70
    CYA 100
    CH 0 tested twice

    Since we put the pool in last year, we have had a high CYA and with a really dry summer last year, added water often. We are on city water, but the town is really small and have lots of iron issues. Needless to say, when I add water I have to add metal out. I hope you all can help me get it back to normal.
    Thanks,
    Marcella
    19 x 34 In-ground Gunite 3.5-7ft deep; 18” raised spa 7’diameter with tiered spillway
    Diamondbright Plaster - Blue; Pentair cartridge filter; Pentair IntelliFlo VS-3050
    Stay-rite Heater 400,000 BTU; In-line chlorinator; Pentair LED lights X2 pool, x1 spa
    3 Bubblers on Tan ledge; Location: Texas Gulf Coast

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    Mod Squad jblizzle's Avatar
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    Re: Messed up pool chemistry...Help!

    If you can not keep the FC level up, then obviously there is something living in the pool and you have to do the Shocking Your Pool process. Adding some "magic powder" every couple days is not going to work ... back to Pool School!!!

    Now, because of your use of tablets and likely dichlor every 2-3 days, your CYA is 100+ ... that is a BIG problem. And you should know the only solutions are drain and replace at least 50% of your water or pay someone $300+ to come out and do a Reverse Osmosis treatment on your pool.

    First, redo the CYA test with a 50/50 mix of pool and tap water to start, then double the result to find out how dire your situation really is ... report back and we can figure something out.
    Jason, TFP Moderator
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    JasonLion's Avatar
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    Re: Messed up pool chemistry...Help!

    You won't make much progress while CYA is that high. Actually, CYA could be higher still, since the common CYA test will report any level above 100 as 100. You need to replace water (or get a reverse osmosis treatment) to bring down the CYA level.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    garden:nut's Avatar
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    Re: Messed up pool chemistry...Help!

    I'm sorry I didnt get to read about the 50/50 prior to draining some of the pool. I drained about 30%, as we have underground springs and dont want to drain too much. I am now refilling right now, but will not get to test till tomorrow evening because I work tomorrow. I am going to re-read the shocking method right now.
    Thank you,
    Marcella
    19 x 34 In-ground Gunite 3.5-7ft deep; 18” raised spa 7’diameter with tiered spillway
    Diamondbright Plaster - Blue; Pentair cartridge filter; Pentair IntelliFlo VS-3050
    Stay-rite Heater 400,000 BTU; In-line chlorinator; Pentair LED lights X2 pool, x1 spa
    3 Bubblers on Tan ledge; Location: Texas Gulf Coast

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    garden:nut's Avatar
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    Re: Messed up pool chemistry...Help!

    Actually, I will add bleach tonight when its full and run all night, then see what it reads tomorrow evening when I get home.
    Thank you,
    Marcella
    19 x 34 In-ground Gunite 3.5-7ft deep; 18” raised spa 7’diameter with tiered spillway
    Diamondbright Plaster - Blue; Pentair cartridge filter; Pentair IntelliFlo VS-3050
    Stay-rite Heater 400,000 BTU; In-line chlorinator; Pentair LED lights X2 pool, x1 spa
    3 Bubblers on Tan ledge; Location: Texas Gulf Coast

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    garden:nut's Avatar
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    Re: Messed up pool chemistry...Help!

    Ok, shocked pool day before yesterday with bleach, had to add acid because PH went up. I did overnight FC loss test last night and held chlorine level.
    Today's test results.
    PH 7.2
    FC 11.5
    CC 0.5
    TC 12
    TA 100
    50/50 CYA 85
    CH 0, and tested this more than 2x

    Also at same time husband took pool water to pool store and results.
    PH 7.4
    FC 5
    CC .05
    TA 110
    CYA 100
    CH 250

    I had bought some Calcium Chloride to add today, but now I am wondering if there is something wrong with my test chemicals. I also tested my tap water for calcium, and it was zero. So I added some Calcium Chloride to the test tube and it was still zero. Could my chemicals from my TF-100 be old? I bought them April of 2011. I dont want to mess the water up more with too much Calcium. Please advise.
    Thank you,
    Marcella
    19 x 34 In-ground Gunite 3.5-7ft deep; 18” raised spa 7’diameter with tiered spillway
    Diamondbright Plaster - Blue; Pentair cartridge filter; Pentair IntelliFlo VS-3050
    Stay-rite Heater 400,000 BTU; In-line chlorinator; Pentair LED lights X2 pool, x1 spa
    3 Bubblers on Tan ledge; Location: Texas Gulf Coast

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    JasonLion's Avatar
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    Re: Messed up pool chemistry...Help!

    From what you said, it seems likely that your calcium indicator dye might have gone bad. Can you describe what happens when you add the indicator dye to the sample while doing the CH test? What color does the sample turn and does it take a moment to get there, or is it that color right off?
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    garden:nut's Avatar
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    Re: Messed up pool chemistry...Help!

    I add 20 drops of R-0010 and its clear, I add 5 drops of R-0011L and its clear.
    19 x 34 In-ground Gunite 3.5-7ft deep; 18” raised spa 7’diameter with tiered spillway
    Diamondbright Plaster - Blue; Pentair cartridge filter; Pentair IntelliFlo VS-3050
    Stay-rite Heater 400,000 BTU; In-line chlorinator; Pentair LED lights X2 pool, x1 spa
    3 Bubblers on Tan ledge; Location: Texas Gulf Coast

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    JasonLion's Avatar
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    Re: Messed up pool chemistry...Help!

    The dye is definitely bad. It should turn either something in the red or blue family of colors. Remaining clear means you need new reagents.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    garden:nut's Avatar
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    Re: Messed up pool chemistry...Help!

    Ok thanks, will order some more right away.
    19 x 34 In-ground Gunite 3.5-7ft deep; 18” raised spa 7’diameter with tiered spillway
    Diamondbright Plaster - Blue; Pentair cartridge filter; Pentair IntelliFlo VS-3050
    Stay-rite Heater 400,000 BTU; In-line chlorinator; Pentair LED lights X2 pool, x1 spa
    3 Bubblers on Tan ledge; Location: Texas Gulf Coast

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    Mod Squad jblizzle's Avatar
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    Re: Messed up pool chemistry...Help!

    Does your CYA test mean you measured 42.5???? and doubled it? Or you measured 85 so it is 170 ppm?

    Are you aware that when the FC > 10ppm the pH reads falsely high?

    Posted with Tapatalk ... sorry if I sound short ... hate typing on phone
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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    garden:nut's Avatar
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    Re: Messed up pool chemistry...Help!

    No, I didnt know that the PH would be false if the FC is >10ppm. So that means that I shouldnt have added some acid? The PH was over 8.2 before this test and I added some acid to bring it back to normal. Now does this mean that it will be really high when the FC goes down? What should I do?
    CYA was measured 50/50 by doubling the number I got while using half tap water and half pool water and I got a little over 40 so I rounded up. Probably wasnt exactly 42.5 . I checked the other way and it was around the 80-90 area also.
    Thank you,
    Marcella
    19 x 34 In-ground Gunite 3.5-7ft deep; 18” raised spa 7’diameter with tiered spillway
    Diamondbright Plaster - Blue; Pentair cartridge filter; Pentair IntelliFlo VS-3050
    Stay-rite Heater 400,000 BTU; In-line chlorinator; Pentair LED lights X2 pool, x1 spa
    3 Bubblers on Tan ledge; Location: Texas Gulf Coast

  13. Back To Top    #13
    garden:nut's Avatar
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    Re: Messed up pool chemistry...Help!

    I was looking at the numbers and seems my CYA @ 85 is still out of the range you recommend. Should I drain and fill again to bring it down?
    Thank you again for your help,
    Marcella
    19 x 34 In-ground Gunite 3.5-7ft deep; 18” raised spa 7’diameter with tiered spillway
    Diamondbright Plaster - Blue; Pentair cartridge filter; Pentair IntelliFlo VS-3050
    Stay-rite Heater 400,000 BTU; In-line chlorinator; Pentair LED lights X2 pool, x1 spa
    3 Bubblers on Tan ledge; Location: Texas Gulf Coast

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    JasonLion's Avatar
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    Re: Messed up pool chemistry...Help!

    Yes, it is a very good idea to replace some more water.

    On PH, just wait for the next time FC is 10 or lower, and test and adjust PH at that time.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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