Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 14 of 14

Thread: black algae and test kit

  1. Back To Top    #1

    Join Date
    Apr 2014
    Location
    California
    Posts
    97

    black algae and test kit

    So I found this site after I already had black algae and have used most tips and have not allowed the ba grow but also have not been able to get rid of it and it's probably because I have a simple pool test kit, is the Taylor 20006 just as good as the tf100 because it's 20$ cheaper, is tftestkit.com the only place to buy it?

    Also my main drain is tied to skimmer and I don't have the spaceship float diverted anymore could that have cause the growth of ba at the deep end?

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

    Re: black algae and test kit

    The K-2006 is neither better and worse than the TF-100. Essentially it is less well balanced, having lots of some tests and too little of others. The TF-100 more than pays for it's self in not needing refills for much longer. TFTestKits.net is the only place to get the TF-100, while the K-2006 is available from many sources. There is a more detailed comparison in Pool School.

    The main drain, or lack thereof, is not a significant issue with black algae. It takes an extended period of way too low FC levels to get black algae. There is an article on fighting black algae in Pool School, not easy and not always successful.
    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
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: black algae and test kit

    The K-2006 and the TF-100 use the same reagents and have basically the same test. BUT, while the TF-100 might cost a little more, you get a LOT more of the reagents that you actually need so it is better value. In fact, given that you have algae and likely need to follow the SLAM process, getting the TF-100 with the XL option would be my recommendation.

    FYI, being in CA, you can get the TF-100 from poolsupplyworld.com faster and for less shipping $. They are west coast distributor for tftestkits.net, but PSW does not have the XL option for the FAS-DPD chlorine test.
    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!

  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: black algae and test kit

    Check out the number of tests you can do with each kit, and then decide. Comparison
    Also be aware that the FAS-DPD refills are very hard to find in stock locally.

    The diverter didn't cause the black algae directly. However, poor circulation might have caused the chlorine level in certain areas of the pool to get too low, especially if there's no swimming or brushing going on to ensure things stay well-mixed. Do you recall jumping in and discovering the depths are a whole lot colder than you were anticipating? If so, you have poor circulation. A diverter will help, and so will playing with the return jets. Aim one down towards the deep end to keep things moving.
    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!

  5. Back To Top    #5

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: black algae and test kit

    Deleted.
    Last edited by MarianParoo; 01-29-2015 at 09:01 PM. Reason: Misread post

  6. Back To Top    #6

    Join Date
    Apr 2014
    Location
    California
    Posts
    97

    Re: black algae and test kit

    Thank you all for your help on the test kits, as for the black algae and it not growing because its winter, lets say my cya is 100 since I can't get the test by this weekend, and my pool is roughly 25k gals, how many gallons of liquid chlorine should i put in on friday, sat and sunday to hopefully kill it

  7. Back To Top    #7
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: black algae and test kit

    If CYA is 100 you have a problem you need to deal with first. The common CYA tests will report any CYA level of 100 or higher as if it was 100. So you actual CYA level could be far higher than you think. You need to replace water until CYA is below 100, preferably down around 80 if you have a SWG, or 60 if you don't.

    Second, simply adding large amounts of chlorine will not kill black algae. See the article on How to Fight Black Algae for more information. And don't actually bother trying to fight the black algae until you have gotten CYA down to something more reasonable.
    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

  8. Back To Top    #8

    Join Date
    Apr 2014
    Location
    California
    Posts
    97

    Re: black algae and test kit

    So since I'm with out a cya test right now, and we are assuming max, tossing in gallons of chlorine is not working effectively to kill it?

  9. Back To Top    #9
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: black algae and test kit

    Correct. You can not blindly start adding chlorine and expect good results ... that is what a pool store would have you do. The TFPC method is really just about understanding your pool’s chemistry and through accurate testing, adding only what the pool NEEDS and not what someone wants to sell you.

    Have you reviewed the ShockLevelAndMAINTAIN Process. You add the required amount of bleach to achieve a certain FC level that is a function of your CYA level multiple times a day. As Jason said, you need to know the CYA first and may need to adjust it before you start to fight the algae.

    Please add your location (City, State or City, Country) to your profile and pool details to your signature as described HERE as it will help us help you.
    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!

  10. Back To Top    #10

    Join Date
    Apr 2014
    Location
    California
    Posts
    97

    Re: black algae and test kit

    I just edited sig, anyone know if any box stores carry the Taylor kit or how I can test the cya this weekend Maybe strips?
    Central valley, California. Inground pool built 1971, plaster, sand filter, hayward ecostar variable pump, 1.5" lines, roughly 25k gallon

  11. Back To Top    #11
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: black algae and test kit

    It is extremely unusual to find a K-2006 in stock at a physical store. People have found it a couple of times, but 98% of the time no luck.

    Test strips are by far the worst way to measure CYA. We never recommend using test strips, and they are especially bad at measuring CYA.

    I don't see any point in rushing this process. It takes a long time to get black algae, and it is going to take a long time to get rid of it. It is best to avoid duplicating effort, and simply wait until you have everything you need.

    If you absolutely must get an estimate of your CYA level right now, your best bet is to have a pool store measure it for you. That is a little hit or miss, but still better odds than a test strip.
    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

  12. Back To Top    #12
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: black algae and test kit

    Quote Originally Posted by JasonLion View Post
    If you absolutely must get an estimate of your CYA level right now, your best bet is to have a pool store measure it for you. That is a little hit or miss, but still better odds than a test strip.
    Assuming the that store is not use a test strip with or without a fancy computer trying to read the color. Make sure they are using the turbidity test where the black dot is obscured. And even then proceed with caution. Many reports of the pool store CYA results being wildly inaccurate are told throughout the forum.
    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!

  13. Back To Top    #13

    Join Date
    Apr 2014
    Location
    California
    Posts
    97

    Re: black algae and test kit

    Well you guys where correct I can not find any k2006 at any local pool store, I will order one this evening and post test results once I get it and post results here before proceeding with the b/a extermination

  14. Back To Top    #14

    Join Date
    Jun 2011
    Location
    Long Beach, CA
    Posts
    2,670

    Re: black algae and test kit

    Do a search for the extended test kit directions and pay attention to the CYA directions for testing CYA that is over 90. These directions will give you a heads up on how to do all the tests.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

Posting Permissions

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