Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: Black algae break out

  1. Back To Top    #1

    In the Industry

    X-PertPool's Avatar
    Join Date
    Jun 2009
    Location
    Exeter, PA
    Posts
    1,385

    Black algae break out

    I have a customer with a swg an a black algae break out. The liner is new, after I check to make sure all the levels are good should I just maintain a shock level and scrubs spots with tri-tab? Or do you think I risk damaging the liner ?
    -Kevin
    X-Pert Pool Service
    x-pertpool.com
    X-Pert Pool on Facebook and @XPertPoolServic on Twitter
    22,000 gal / 16' x 32' / Vinyl / Hayward s244t /Pentair SuperFlo 1 hp

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Black algae break out

    Black algae is almost completely unheard of with a vinyl liner. Black algae survives chlorine by digging into the plaster. It can't dig into vinyl, so gets brushed off and killed by chlorine. Are you sure it is black algae?
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    In the Industry

    X-PertPool's Avatar
    Join Date
    Jun 2009
    Location
    Exeter, PA
    Posts
    1,385

    Re: Black algae break out

    I know they had it last year and got rid of it through brushing and black treat ( which made bromine for quite a while). I'm going to check it personally this time, find a chunk and do that smear test. I'm worried that it can dig into vinyl too, for example a magic marker will eventually bleed through the vinyl from the back to front; similar to that vinyl "plaque" where the stain is mirrored on the back of the vinyl. I'll let you know come Monday
    -Kevin
    X-Pert Pool Service
    x-pertpool.com
    X-Pert Pool on Facebook and @XPertPoolServic on Twitter
    22,000 gal / 16' x 32' / Vinyl / Hayward s244t /Pentair SuperFlo 1 hp

  4. Back To Top    #4

    In the Industry

    X-PertPool's Avatar
    Join Date
    Jun 2009
    Location
    Exeter, PA
    Posts
    1,385

    Re: Black algae break out


    The Dots of algae in the pool

    a green scab of algae

    the "smear test", the brown on the right side of the paper turned out to be a chunk of dirt or fertilizer.

    This algae looks different from what was in the pool last year. Although this stuff is strange on it's own. Let me know what you guys think.

    By the way I did place that scab in a bottle of highly chlorinated water and it turned yellow then white and then disintegrated.
    -Kevin
    X-Pert Pool Service
    x-pertpool.com
    X-Pert Pool on Facebook and @XPertPoolServic on Twitter
    22,000 gal / 16' x 32' / Vinyl / Hayward s244t /Pentair SuperFlo 1 hp

  5. Back To Top    #5

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,085

    Re: Black algae break out

    Good pics. It is clearly algae of some sort and you have already discovered the cure....chlorine.

    Shock the pool according to the article in Pool School and, during that shock process, you are going to have to devise some method of physically removing all those nodules to get them exposed to the chlorine.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

Posting Permissions

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