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Thread: Algae: new to TFP

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    Join Date
    Jul 2016
    Location
    Orlando, Florida
    Posts
    3

    Algae: new to TFP

    Things were going swimmingly until I return from vacation to a slightly green pool. Pool store advised Zappit shock (73% calcium hypochlorite). The pool cleared up and was looking good. We cleaned filters, brushed, and cleaned up floats... The chlorine levels were high for about a week...in the 20's. My CYA was 80, but pool store said that was great. FC went down to what I think is the standard (3-5) and a few weeks later the algae starts appearing in the corners by the steps. I put in 8oz Zappit, the pool looks clear again. The pool store is telling me I should just put the zappit in the pool every week as part of my routine. After reading TFP, I'm not going to do it. I'm assuming I need to drain water, stop using pucks and go with liquid chlorine, bleach. How much water do I need to drain? The water table is very high here in Florida.

    my numbers:
    Fc= 10
    CC= 0
    PH= 8.0
    CYA= 90
    TA= 110
    CH= 280
    Spring 2016, IG, Pebble, 9500 gal, cartridge,tablet chlorinator (pucks), clear03 Ozone by paramount, Ultra UV, Pentair Superflo VS, screened. Sheer descent. 2 drains, 1 skimmer, large sun shelf. 6.5' deep at deep end. Taylor FAS-DPD K-2006C

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    TFP Guide

    Join Date
    Jul 2015
    Location
    Central Valley CA
    Posts
    1,073

    Re: Algae: new to TFP

    Welcome to the fourm

    Pool Math link will tell you how much water to replace based on the target CYA you set. Sound like you know to not drain too much at one time based on the water table comment. It is possible to SLAM with CYA of 90 it is just that it can be expensive, so if you like you can strike a balance do some drain and fills to get the CYA to the 60 or 70 range then read and follow the SLAM directions in Pool School. Once you have the pool under control a CYA of 60 is not such a bad thing and you can always lower it a bit more this winter with rain water fill and drains.
    12,300 Gallon, IG PebbleFina, 3 ft sheer, 2 Jandy nicheless LED lights, Jandy Pro 1.5HP VS pump (A.O. Smith Motor), PB4-60 Booster pump, Polaris 280, Jandy cv340 cartridge filter, Zodiac Z4 control panel W/iAquaLink, Stenner pumps for chlorine & MA connected to WiOn WiFi switches, TF-100. You can support TFP with AmazonSmile just click the link!

  3. Back To Top    #3

    Join Date
    Jul 2016
    Location
    Orlando, Florida
    Posts
    3

    Re: Algae: new to TFP

    Thank you! We drained and filled and the CYA was at 50! Yippe! We are into the slam process! Thanks!

    - - - Updated - - -

    Another quick question. Going forward we will be using bleach and not pucks. When we go on vacation, and use the chlorinator with the pucks, what can we expect to happen to the CYA in a week?
    Spring 2016, IG, Pebble, 9500 gal, cartridge,tablet chlorinator (pucks), clear03 Ozone by paramount, Ultra UV, Pentair Superflo VS, screened. Sheer descent. 2 drains, 1 skimmer, large sun shelf. 6.5' deep at deep end. Taylor FAS-DPD K-2006C

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