Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Algae is gone, but the water is not right....

  1. Back To Top    #1
    Hurricane Gio's Avatar
    Join Date
    Apr 2010
    Location
    Coral Gables, FL
    Posts
    197

    Algae is gone, but the water is not right....

    Yesterday we decided to get our first swim in as the water was finally warm. The kids complaint that the water seemed to irritate their eyes a bit. Mine did as well. The water also had a strong oder. It smelled like chlorine, but not quite.
    I shocked last week and the SWG had been on at 35%. I also dumped a bunch of liquid CYA to get it up.

    I tested the water today.

    FC: 25
    CC 0
    pH 7.2
    TA: 100 (finally down)
    CYA: 70

    I am not sure if the FC is no hight to swim or the pH is a bit low or a combo. I am leaving the SWG and solar cover off until thursday or Friday to get the FC down. I also lowered the water by 1" to get the skimmer flowing better.

    Sounds like the right plan? Should I wait until the FC is under 12 to swim? Should be a day or two in the hot Florida sun right now.
    8,000 Gal, 11 x 26.8ft Shotcrete Pool with "Cool Blue" Diamond Brite by ESSIG Pools with Artistic Pavers Deck
    Goldine AQL-PLUS w/Aqua Pod, Aqua-Rite T-CELL-15 SWG, Pentair WhisperFlo High Performance 1.5HP, 2 speed pump, Pentair IntelliBrite,
    Pentair 100sqft Cartridge Filter, 6 Pool returns, Skimmer and 2 Anti-Vortex Main Drains
    Pool's completed build 2/2010

  2. Back To Top    #2
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: Algae is gone, but the water is not right....

    The two things that usually are irritating are CC's and pH outta whack.

    The pH could very well be too low because testing when FC is bove 10 can skew the test to read a false high.

    Because you smell a strong odor kinda like chlorine, it makes me suspicious of algae/organics.

    The water was probably above shock level yesterday and not a good idea to swim.
    Always test before you swim and know what you are getting into.

    My suggestion is, first, run the OCLT (SWG off) to rule out organics.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  3. Back To Top    #3
    Hurricane Gio's Avatar
    Join Date
    Apr 2010
    Location
    Coral Gables, FL
    Posts
    197

    Algae is gone, but the water is not right....

    I ran the overnight test last week and I was good. I have a feeling that the pH was out of wack.
    8,000 Gal, 11 x 26.8ft Shotcrete Pool with "Cool Blue" Diamond Brite by ESSIG Pools with Artistic Pavers Deck
    Goldine AQL-PLUS w/Aqua Pod, Aqua-Rite T-CELL-15 SWG, Pentair WhisperFlo High Performance 1.5HP, 2 speed pump, Pentair IntelliBrite,
    Pentair 100sqft Cartridge Filter, 6 Pool returns, Skimmer and 2 Anti-Vortex Main Drains
    Pool's completed build 2/2010

  4. Back To Top    #4

    Re: Algae is gone, but the water is not right....

    If we assume that all of the phenol red has been converted into chlorophenol red, then the following conversion can give you an idea of the true pH.

    Apparent......Actual
    6.8.................5.0
    7.0.................5.3
    7.2................5.6
    7.4................5.9
    7.6...............6.2
    7.8...............6.5
    8.0...............6.8

    If only part of the phenol red was converted into chlorophenol red, then the true pH would be somewhere between the two numbers.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •