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Thread: Next Step??

  1. Back To Top    #1

    Join Date
    May 2010
    Durham, CT

    Next Step??

    Had a leak in my pool this year (Hydrostatic Valve) and had to add about 14000 gallons to a 24000 gallon gunnite pool. So basically I am starting over with pool chemistry. This in only my second year owning this pool, and I only discovered this site a few days ago. Thank God!! The pool builder told me almost nothing.

    Here are my readings:
    FC - 0
    PH - 7.2
    Alkalinity - 80
    Calcium - 150
    Salt - 300
    CYA - 20 or so (not sure)
    Salt 300

    Not to concerned about pH, since this is a new pool and I went through cases of acid last year to keep the pH down. I already put in one gallon of acid a couple of days ago because the level was very high.

    I am using Leslies test kit, so I am not sure about the CYA level. Kind of hard to read. However, I put in 2 gallons of liquid stabilizer a couple of days ago. That didn't seem to do much. Back to the pool store; they gave me 1 lb of the granular stuff. Boy, is that hard to dissolve. Added this in yesterday.

    Here is my question: I read that the granular stabilizer takes about 1 week to register. I also bought 3 lb of dichlor; I have stuff sitting in the garage to bring up the Calcium hardness and 400 lb of salt since I do have a SWG system. So right now I am planning on adding 1 lb of dichlor to bring up the Free chloring and CYA today. Then add the salt tomorrow and turn on the SWG system. Wait until Thursday and re-test CYA; go from there. Or should I add more than just 1 lb of dichlor; how much does it bring up the CYA level???

    The other question I had; does it really make sense to raise the CYA into the 60-80 ppm range, even for SWG systems? Once you are too high the only way to bring it down is with replacing water. Seems kind of dangerous. Last year I had my SWG system at the lowest setting since it created a lot of chlorine. Of course I have no idea what the CYA reading were since the pool company never even told me about that one. Again, thank god for this site?

    24000 gallon Gunnite Pool
    WhisperFlo 1.5 hp Pump
    AquaConfort SWG System
    Solar Heating System

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: Next Step??

    According to pool calculator you would need 4 gallons of liquid stabilizer to go from zero to 70ppm. Since you've added liquid and granuals I would wait a week and then retest.

    Add the dichlor and then test to see where your FC is.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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