Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 10 of 10

Thread: Turned green and numbers are way off! Help!

  1. Back To Top    #1

    Join Date
    Mar 2014
    Location
    Linden NC
    Posts
    3

    Turned green and numbers are way off! Help!

    I am so frustrated this pool season already!!!

    My levels were all good and within range. I upped the ph from 7.2 to 7.5 in hopes to clear up the cloudiness. Until three days ago -- my water started turning green again. I had issues last year with yellow mustard algae so I shocked at mustard levels (34) with 8.25% clorax. It did not do anything to the green water. Tested again today and my ph is 8.2, TA 90, CYA 75 (due to using trichlor tabs), FC 0, CH 125.

    Should I add water to lower CYA and PH and go from there?????
    18*32*52" oval pool Hayward 1.5 sandfilter

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,090

    Re: Turned green and numbers are way off! Help!

    Welcome to TFP!

    Your main problem is lack of chlorine. You don't have any now, and the algae is growing rapidly. Once the pool goes green, the algae can consume even shock levels of chlorine a very short while. We prefer to use the term SLAM instead of shock, because it emphasizes that you need to maintain the high chlorine level until the problem is resolved. Check out SLAMing Your Pool and Defeating Algae

    Whether you drain or not is up to you. 75 is borderline high. It can probably be managed, but may require a little more care than you'd need at reasonable CYA levels.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3
    Isaac-1's Avatar
    Join Date
    May 2010
    Location
    SW Louisiana
    Posts
    6,711

    Re: Turned green and numbers are way off! Help!

    Personally if water is cheap where you live I would drain and replace about 1/3 of it, then adjust the pH followed by the slam procedure. Then stop using stabilized chlorine and maintain proper FC levels so you don't have to do this again every year.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
    ~Remember TFP counts on your donations to keep this site ad free~

  4. Back To Top    #4

    Join Date
    Mar 2014
    Location
    Linden NC
    Posts
    3

    Re: Turned green and numbers are way off! Help!

    So I have been SLAMing pool since yesterday afternoon. My CYA is currently at 52ish, FC was at 11 so I upped it to 20. and it is still PEA GREEN!!!!! What am I doing wrong???
    18*32*52" oval pool Hayward 1.5 sandfilter

  5. Back To Top    #5
    Isaac-1's Avatar
    Join Date
    May 2010
    Location
    SW Louisiana
    Posts
    6,711

    Re: Turned green and numbers are way off! Help!

    You just need to maintain the FC a little over 20, and give it some time, the key here is MAINTAIN
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
    ~Remember TFP counts on your donations to keep this site ad free~

  6. Back To Top    #6
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: Turned green and numbers are way off! Help!

    Running pump/filter 24/7? Are you backwashing/rinsing when pressure rises 25% over clean filter psi?

    Is your fill water municipal or well water?

    Did you replace water to reduce CYA or retested & got a different result?
    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!

  7. Back To Top    #7
    Charlie_R's Avatar
    Join Date
    May 2013
    Location
    Mexico, MO
    Posts
    2,156

    Re: Turned green and numbers are way off! Help!

    One thing I haven't noticed yet is what are you using to test with? If it is pool store testing, ALL numbers are suspect, and if it's strips, it would be even worse.

    If you don't already have one, the TF-100 is the best investment in you pool you will ever make. http://TFtestkits.net
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

  8. Back To Top    #8

    TFP Guide

    Kiss4aFrog's Avatar
    Join Date
    May 2013
    Location
    Hudson, WI
    Posts
    2,602

    Re: Turned green and numbers are way off! Help!

    Here is a link to the chart for how much FC to use for maintenance and SLAM in relation to your CYA level: http://www.troublefreepool.com/conte...art-slam-shock
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
    Solar Blanket, Well Water, Borax Added, TF-100 tester. ? too cold
    1979, 275gal Conway Emerald Spa P-100-2, ES-2 Spa Pack, bromine floater, indoor
    TF-100, Best test kit - TFTestkits.net
    Please help keep the lights on, become a TFP Supporter!

  9. Back To Top    #9

    Join Date
    Mar 2014
    Location
    Linden NC
    Posts
    3

    Re: Turned green and numbers are way off! Help!

    Soooo.... my pool is still green but looking better finally. I think I was having problems with the filter. I emptied the water and moved/loosen up the sand and now when I backwash it is actually cleaning itself out. @ Charlie R -- I am using the TF-100 tester kit.

    So if my FC stayed at 18 over three hours in hot sun, does that mean the algae is finally dying??
    18*32*52" oval pool Hayward 1.5 sandfilter

  10. Back To Top    #10

    Re: Turned green and numbers are way off! Help!

    Quote Originally Posted by tcbdab View Post
    So if my FC stayed at 18 over three hours in hot sun, does that mean the algae is finally dying??
    Three hours of sun and no chlorine loss means the sun is dying!
    20,000 gal in-ground plaster pool with sand filter. Replastered recently. Mostly adding bleach and acid. CYA was high when I took over.

Posting Permissions

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