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Thread: 2nd year on TFP - what to adjust before slam

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    2nd year on TFP - what to adjust before slam

    Pool was opened last week - water not too bad but green algae on bottom and sides.

    TF100 test kit results:

    FC 0
    CC 0 ?
    pH 7.0
    TA 30
    CH 120
    CYA 0

    I have my stabilizer ready and aiming for target of 30 CYA. To SLAM I will aim for FC of 12?
    Adjust the pH to 7.5 with baking soda
    Do I adjust TA now or wait?

    Any other suggestions?
    20,000 gallon, IG vinyl, Sand filter, 2010 install

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    Mod Squad zea3's Avatar
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    Re: 2nd year on TFP - what to adjust before slam

    I have a question about your CYA. Did you have CYA when you closed the pool? If so did you have a lot of water replacement due to snow or rain?

    Your pH is fine, it will come up during the slam. Wait until after the slam to see if TA needs any adjustment. Odds are the TA is fine where it is.
    TFP Moderator
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    Re: 2nd year on TFP - what to adjust before slam

    CYA was less than 30 when the pool was closed in November. The black dot never disappears on the test and water is completely clear in tester.
    20,000 gallon, IG vinyl, Sand filter, 2010 install

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    Re: 2nd year on TFP - what to adjust before slam

    DO NOT use baking soda to raise pH.

    Raise your pH to around 7.4 using 20 mule team borax......the TA will rise also. Then SLAM

    Brush that algae up into the water so the FC can kill it.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: 2nd year on TFP - what to adjust before slam

    Thanks Dave! Need to look at my notes closer and I would have caught that!!
    How long after adjusting ph can I start adding bleach?
    20,000 gallon, IG vinyl, Sand filter, 2010 install

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    Patrick_B's Avatar
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    Re: 2nd year on TFP - what to adjust before slam

    If you want you can move to a different spot and add chlorine right away. Even doing that is overkill in this situation. Adding some products together or right on top of each other isn't adviseable however.
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    Re: 2nd year on TFP - what to adjust before slam

    Thanks zea3 and Patrick_B!

    Re-checked the pH and it could have been 7.2. I hate the pH test - so hard to determine the colors!

    Didn't have any Borax so just started the SLAM.
    20,000 gallon, IG vinyl, Sand filter, 2010 install

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