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Thread: Algae problems, low FC, low Stabilizer

  1. Back To Top    #1

    Join Date
    Aug 2014
    Easton, MD

    Algae problems, low FC, low Stabilizer

    We have some algae in the pool so I took water to the pool store to have it tested. My test results were as follows:

    FC .8 ppm
    TC .8 ppm
    CC 0
    CYA 19 ppm
    ph 8.3
    Hardness 87 ppm
    Alkalinity (w/stabilizer correction) 168
    Salt 3300

    Per their instructions we added 25# calcium, 3# stabilizer, ran superchlorinate for 6 hours, 6# of ph down. We cleaned the algae off the sides and bottom and steps and backwashed before we added the stabilizer. Should we also be shocking the pool at the same time?

    Thanks for any help you can provide, we usually have very little problems once we've opened the pool and balanced the chemicals so this is new to us.

    36x18 IG Vinyl liner 24,000 gal, SWG
    Hayward DE Filter (DE4820), Installed @1998

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Algae problems, low FC, low Stabilizer

    Welcome to TFP!

    To clear up the pool you need to follow the SLAM process. To do that, you need one of the recommended test kits with the FAS-DPD chlorine test.

    Stop trusting the pool store. Low CH does not matter in your pool, so that was money that could have gone towards your test kit.

    Have you found Pool School on the forum? Go read the ABCs of water chemistry so we can speak the same language.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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