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Thread: Partial Water Change

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    les_garten's Avatar
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    Partial Water Change

    I had high CYA so I just did about 50% water change.

    I am going to check everything and see if the CYA is where it needs to be. If not, I'll drop some more water out.

    Once I get the CYA where it needs to be, what order should I balance the other chemicals in.

    I'm a BBB pool.
    14x30 PebbleTec(Caribbean Blue) 12,000 Gals BORAX
    Pentair IntelliFlo <<>> Pentair FNS Plus DE
    Pentair 5G Intellibrite w/Intellibrite Controller
    ROME Solarium 125 Heat Pump
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    Mod Squad jblizzle's Avatar
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    Re: Partial Water Change

    Post up a full set of results and we can help form a plan.

    What does the water look like? Any reason to have to go through the shock process?
    Jason, TFP Moderator
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    les_garten's Avatar
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    Re: Partial Water Change

    Quote Originally Posted by jblizzle
    Post up a full set of results and we can help form a plan.

    What does the water look like? Any reason to have to go through the shock process?
    Water looks like Gin!

    I know I'll most likely have to adjust Alkalinity, Calcium, and pH. Fixing Borates will be last.

    Was wondering what order to adjust them in.

    Chlorine of my add water is 2 ppm, city water.
    14x30 PebbleTec(Caribbean Blue) 12,000 Gals BORAX
    Pentair IntelliFlo <<>> Pentair FNS Plus DE
    Pentair 5G Intellibrite w/Intellibrite Controller
    ROME Solarium 125 Heat Pump
    Kreepy Krauly Classic <<>> Pentair 320 Feeder

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    Mod Squad jblizzle's Avatar
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    Re: Partial Water Change

    FC and pH are the most important.
    CH might need adjusted (only can adjust up)
    TA usually can be ignored unless it is too low. There is a process in Pool School to lower it if you want.
    Certainly want pH and TA correct before you add more borates though.
    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
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    les_garten's Avatar
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    Re: Partial Water Change

    OK, did a check today.

    I thought I changed about 40 -50%. Not sure though, and I chickened out when one end of the pool got low

    Here's the numbers

    CYA: 100
    CL 2
    pH 7.2
    TA 50
    CH 240

    I'm pulling another big slug back out of it right now. I really want the CYA down, I use Tablets and it'll go up for sure.

    I have the Taylor kit and the CYA test seems kinda screwy, is there a better one out there?

    The guys at the Pool store use a bigger one, but it must take a bunch more reagent I would think.
    14x30 PebbleTec(Caribbean Blue) 12,000 Gals BORAX
    Pentair IntelliFlo <<>> Pentair FNS Plus DE
    Pentair 5G Intellibrite w/Intellibrite Controller
    ROME Solarium 125 Heat Pump
    Kreepy Krauly Classic <<>> Pentair 320 Feeder

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