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Thread: Can't get it clear

  1. Back To Top    #1

    Join Date
    May 2014
    Pasco, WA

    Can't get it clear

    I've been using the TFP method on my above ground salt water pool for the last 3 years. The first 2 years it was easy. I stayed on top of it and never had any problems. This year I am struggling. Water has been slightly cloudy since opening and I can not get it clear. Lately it has taken on a slight green tint.

    The mystery is that my numbers have always been solid/spot on. Here they are from my last test:

    FC: 5.5
    CC: .5
    PH: 7.6
    TA: 90
    CH: 80
    CYA: 60

    Pool stats:
    Above Ground
    Vinyl Liner
    17000 Gallons
    Pump run time: 12 hours at 100% generation

    I haven't done a slam because my numbers have been right on. But I'm thinking it's my only option at this point. I wanted to come to the professionals first and see if I was missing anything. Could the sand in my filter need replacing (it's only 3 years old)?

    Any suggestions?

    18k gal, AG, Sand filter, Aqua Trol SWG, Installed 5/2014

  2. Back To Top    #2
    Mod Squad Texas Splash's Avatar
    Join Date
    Jun 2014
    South-Central Texas, Marion/San Antonio

    Re: Can't get it clear

    Definitely SLAM, the sooner the better. You see green/tinted water, hit it now. One problem I suspect may have contributed to the issue is your CYA is a bit low for a SWG pool. Not a lot, but perhaps just enough to where your SWG is struggling to maintain that required FC range. So once you complete the SLAM, consider raising your CYA to a minimum of 70 and see if that helps you maintain FC a little better.

    As for the sand, it should still be fine, although a deep cleaning might not be a bad idea: Deep Cleaning a Sand Filter

    Hope that helps.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  3. Back To Top    #3

    Join Date
    May 2015
    Gaylesville, AL

    Re: Can't get it clear

    Correct me if I'm wrong here, but for a salt water system, aren't your TA, and CYA levels a bit low, which would mean that so is your FC?
    14600 gal Intex 24' Round 52" deep AG Pool (Heavily Modified)
    200lb sand filter w/2 speed 1.5/0.5hp pump
    Stenner 45MHP10 Liquid Chlorine (well... bleach) Injector. Borates added.
    K-2006 test kit w/Speedstir

  4. Back To Top    #4
    Mod Squad
    Join Date
    Aug 2012
    DFW, TX

    Re: Can't get it clear

    Doing an Overnight Chlorine Loss Test will always give you an answer on whether to SLAM or not.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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