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Thread: Test Results and Suspected Algae

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    Test Results and Suspected Algae

    First post, but have been lurking a bit and ordered the TF-100 because of the greenish 'dust' that keeps re-appearing on the pool floor after cleaning. I've added a pretty crappy cell pic but at least you can see the tracks my Kreepy Krauly has been making through the muck. The water is actually pretty clear although the pic doesn't really show it.



    I suspect this is algae and would like confirmation as such. If I vacuum it all up, it will be back in a few days. I use liquid chlorine from the pool store along with the trichlor pucks. Looking to switch to the BBB method pretty soon to get away from the pucks.

    Last evening's test results:
    FC 11.5 - higher than I thought it would have been but I had added about 1.25 gal of chlorine on Wed morning.
    CC .5
    ph 7.5
    T/A 90
    CH 625*
    CYA 60
    Temp was 86-87 at time sample was pulled; I kicked the pump on for about 45 mins before I pulled the sample

    *Had a hard time getting a CH reading; got one by using the alternate test approach listed under the extended test instructions post. The water here is pretty hard.


    So I'm assuming I need to follow the Defeating Algae instructions to whip this thing in shape.
    True?
    If so, any other suggestions after getting the algae under control?

    Thanks in advance...
    10,000 gal; In ground; Plaster; 1HP pump; Hayward CX900RE cartridge 90 sq ft filter; Kreepy Krauly Kruiser

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    Re: Test Results and Suspected Algae

    If you truly believe it's algae, you need to follow the directions in "Shock Your Pool"
    pool-school/shocking_your_pool
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Mod Squad Bama Rambler's Avatar
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    Re: Test Results and Suspected Algae

    The easiest way to tell if it's algae is to run the OCLT. If you pass the test it's not algae.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Test Results and Suspected Algae

    If so, any other suggestions after getting the algae under control?
    Your description sounds like mustard algae but, regardless, chlorine is the answer....you're gonna' need more than you think....I promise.

    Stop using the pucks now. Your CYA is as high as you EVER want it to be and continued use will soon make your pool water VERY difficult to manage. Don't throw them away as they keep forever and you can use them next summer without the problem of overstabilizing.

    Your CH is pretty high but manageable. The best way to prevent CH from being a problem is to control your pH very carefully. I would suggest you not let it get any higher than it is now. Try to keep it in a 7.2 - 7.5 range. Keep it down there with muriatic when needed.

    Read Pool School cover to cover. It is a wealth of information.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Test Results and Suspected Algae

    Thanks for the feedback. Gonna do the OCLT tonight and see what it shows. Probably spend the weekend shocking. Glad to have stumbled across this site and the wealth of info it offers.
    10,000 gal; In ground; Plaster; 1HP pump; Hayward CX900RE cartridge 90 sq ft filter; Kreepy Krauly Kruiser

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    Richard320's Avatar
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    Re: Test Results and Suspected Algae

    If it's algae,

    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!

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    Re: Test Results and Suspected Algae

    I've passed the OCLT a couple times so I'm hoping that I've killed off anything funky, but here's a question. After doing more reading on here, I decided to get a stainless steel brush to replace the nylon brush I've been using. Just got it today and just brushed a few areas real quick to see what would happen. The water in the surrounding area got pretty cloudy, what's up with that? Going to brush the entire pool this evening but just wondered what I'm brushing off the walls/floor. Just a build up of "schmutz"? Scale/metal/assorted crapola?
    10,000 gal; In ground; Plaster; 1HP pump; Hayward CX900RE cartridge 90 sq ft filter; Kreepy Krauly Kruiser

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    Mod Squad Bama Rambler's Avatar
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    Re: Test Results and Suspected Algae

    Probably scale if you haven't brushed it good in a while.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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