Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: Algae?

  1. Back To Top    #1

    Join Date
    Jul 2014
    Location
    West Chester, PA
    Posts
    17

    Algae?

    New pool owner. Recently switched over to BBB. Water Clarity around 85% (missing that last little sparkle). Clear to drain in deep end but a little blurry.

    Some areas of the pool have a brownish "powder" along the bottom. When you waive or kick your feet close to vinyl liner it kind of blows away. Easily sweeps away with the pool brush. Nothing really sticking to vinyl and only some areas have this light dusting. Hard to see it unless you sweep it. Is this algae?? If so, is it alive or dead? Its been around for like 2 weeks with no improvement or spreading. This am I raised FC from 6 to 10 to see if any improvement. Nothing changed.

    Slam time, and if so, according to CYA/FC chart my goal is around 32ppm for algae slam right? If I do slam, when is safe to re-enter the pool. Kids.

    Taylor Test Results:

    FC 10
    CC 0
    PH 7.4
    ALK 100
    CH 150
    CYA 55

    TIA
    25K gal vinyl, hayward s200 sand, hayward 3/4 hp, newly adopted BBB pool care

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Algae?

    You can swim up to the shock level with no issues. So keep it up at shock level while you can and let it drift down a bit for them to swim when you want. It will slow does the SLAM process a little bit, but a pool is meant to be swam in ... especially if you are just missing a little sparkle
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  3. Back To Top    #3
    pwrstrk's Avatar
    Join Date
    Aug 2012
    Location
    Elverson Pa.
    Posts
    4,758

    Algae?

    The brownish stuff could be dead algae. When you touch it does it poof up and disappear ? If it does it's probably dead algae.
    With your CYA level at 55 I would round up and use 60. Your FC range would be a min of 5 and you should be targeting 9. SLAM level is 24. How are you chlorinating your pool now ? Have your FC levels dropped below the min at all lately ?
    I'm going to suggest you do an OCLT Test to confirm if you have organics or not.
    Here are a couple of good articles from pool school to read.
    ABC'S Of Pool Water Chemistry
    How To Chlorinate Your Pool
    If you have any questions don't hesitate to ask. 😎
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

  4. Back To Top    #4
    lynzizzle's Avatar
    Join Date
    Jun 2014
    Location
    Sharpsville, IN
    Posts
    280

    Re: Algae?

    I was told by another expert on here that the brown stuff at the bottom IS dead algae and the only way to get rid of it is to either A) vacuum and backwash B) vacuum to waste, but then you will need to add water after - My opinion: vacuum to waste and refill so that there is no chance of the dead stuff reentering
    Lynzizzle

    IG, 25k gal (est.), concrete free form, Hayward S-244T 300lb sand filter,
    well water, Pump: AO Smith 3/4 hp, VSpd: Unknown, Pool Age: Unknown
    Welcome to our OOL. Notice there's no "P" in it?

  5. Back To Top    #5
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Algae?

    Kill it. If it isn't algae, all you've done is waste a couple jugs of bleach. If it is algae, you caught it early and saved a couple dozen jugs of bleach. Raise FC to shock level and check any hiding places like ladders and steps. And try adding some DE (or cellulose) to your sand filter to really polish it up.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  6. Back To Top    #6

    Join Date
    Jul 2014
    Location
    West Chester, PA
    Posts
    17

    Re: Algae?

    Thank you all. I will try the oclt test tonight and see what it says in the am. I run the filter for a couple hours in the middle of the night. Is this ok for the oclt test or should I keep everything off?

    Yes, when you touch or wave hand near the brown dust, it kind of blows away and disappears into the water. Hoping it's just dead algae.

    I'm chlorinating with liquid bleach 18%. (That's what pool store told me it was). Is that even possible? Seams to be accurate according to pool math.

    On a hot sunny day, pool uses around 2-3 ppm during the day. I then add about a qt (32ozs) each day to put back those 2-3ppm.

    If I do have to slam (after oclt results), pool math says algae slam 32, is this what I should be aiming for or should I be slamming at the 24 or so level?
    25K gal vinyl, hayward s200 sand, hayward 3/4 hp, newly adopted BBB pool care

  7. Back To Top    #7
    pwrstrk's Avatar
    Join Date
    Aug 2012
    Location
    Elverson Pa.
    Posts
    4,758

    Algae?

    Yes that's dead algae. Vacumm it up.
    Yes let you pump run over night for the OCLT won't hurt a thing.
    Use 24-26 as your shock level. 😎
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

  8. Back To Top    #8

    Join Date
    Jul 2014
    Location
    West Chester, PA
    Posts
    17

    Re: Algae?

    Quote Originally Posted by pwrstrk View Post
    Yes that's dead algae. Vacumm it up.
    Yes let you pump run over night for the OCLT won't hurt a thing.
    Use 24-26 as your shock level. 😎
    Awesome thank you!
    25K gal vinyl, hayward s200 sand, hayward 3/4 hp, newly adopted BBB pool care

Posting Permissions

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