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Thread: Not sure what I have - algae?

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    Join Date
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    Not sure what I have - algae?

    I've been struggling with what I thought was mustard algae since July. Changed pool companies and they were able to get my chlorine levels up, but I don't think it's helped. I took a picture this morning and I've attached. Can someone help me identify, then demolish this stuff. Or, can I shut down this year and start fresh next year. I've scrubbed and shocked until my arms are about to fall off. I've used every product known to the pool world to no avail. I don't have a test kit yet, but ordering it after this post.

    Had to replace the pump (and the darn chord is to short), but using an extension chord (Did have a 2 HP and they said a 1-1/2 HP would work). Replaced the sand in the filter this year.

    15 x 25 AG (9,200 Gallons I think)
    sand filter
    1-1/2-HP pump

    Readings today from pool store (They use the method of testing that you suggest - no machine):
    CYA 65
    TC 4
    FC 4
    PH 7.8 (Added product to bring this down - 1.25 lbs. of low n slow)
    Total ALK: 105
    Adj. Total ALK: 85 (Added product to bring this up)
    Total Hardness: 185
    Attached Images Attached Images
    15 x 25 AG (11,200 Gal)
    Sand
    1-1/2 HP Pump
    8 Year

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    Re: Not sure what I have - algae?

    I can't really tell anything from your picture.

    If the pool store test results are to be taken as accurate, your FC is too low for the CYA level that you have. A CYA of 60 means that the absolute lowest your FC should be to avoid algae or other problems is 5. You need a test kit with a FAS-DPD chlorine test and then you need to check your overnight chlorine loss. The results will tell us what you need to do from that point. Decent test kits are availabel at www.tftestkits.net.

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    Re: Not sure what I have - algae?

    Ordered the TF-100 test kit today. Should I put 1 or 2 lbs of shock in tonight?
    15 x 25 AG (11,200 Gal)
    Sand
    1-1/2 HP Pump
    8 Year

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    Re: Not sure what I have - algae?

    Please don't use powdered shock. It will add CYA to your pool which will require a higher chlorine demand and make battling algae almost impossible. Instead read pool school about shocking your pool. Clorox will become your best friend.
    18'x48" AG
    Pentair 1 1/2 HP Dynamo Pump
    Sand Dollar Sand Filter w/ Zeobrite
    Lil Shark Vacuum System
    Hard Plumbed

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    Re: Not sure what I have - algae?

    Holy cow. Added powdered shock. Can't wait till my test kit gets here.
    15 x 25 AG (11,200 Gal)
    Sand
    1-1/2 HP Pump
    8 Year

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    y_not's Avatar
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    Re: Not sure what I have - algae?

    rhharmon,

    Welcome to the forum, glad to have you here.

    Consider adding your pool info and location to your profile and signature using the below, helpful link.
    pool-school/read_before_you_post

    BTW, This site as well as its members will give you the knowledge to make your pool clearer and more pristine than you have ever seen in.
    Enjoy and have fun!!
    Thanks for reading... - Tony
    Da' Pool: Intex 15'x42" 3284gal AGP EasySet (Inflatable Ring) - (Summer 2014: 27' round EW /w 6.5' deep end @ 22,500gal)
    Pump & Cart Mod: 1000gph Cart. 5ft² - 2 nylons, 24/7 OP. Traps bugs/bits, lasts longer/cleans easier = Happier Pool Owner!!
    The Bible for a "Trouble Free Pool" life = PoolSchool, the BBB method a TF100 test kit(Recommend Kits Compared). - Cleaning a Sand Filter
    Water looks like GLASS, if yours doesn't...SLAM IT! Feels nice and never been happier!!! :D

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    Re: Not sure what I have - algae?

    Can I shut it down this year and start fresh next year?
    15 x 25 AG (11,200 Gal)
    Sand
    1-1/2 HP Pump
    8 Year

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    Smykowski's Avatar
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    Re: Not sure what I have - algae?

    Up to you, the work will be done now or later.

    If your CYA is high, draining over the winter will help that, and the process could be easier in the spring.

    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Re: Not sure what I have - algae?

    Is there something I need to be doing to the pool while I'm waiting on the test kit?
    15 x 25 AG (11,200 Gal)
    Sand
    1-1/2 HP Pump
    8 Year

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    y_not's Avatar
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    Re: Not sure what I have - algae?

    Quote Originally Posted by rhharmon
    Is there something I need to be doing to the pool while I'm waiting on the test kit?
    No, other than keeping your CL levels up, there really isn't anything you can do to properly begin the shock process without your kit. Just keep CL in it, so it doesn't get any worse and you'll be no worse off than you have been.

    Just keep adding bleach using pool calc based on readings from your basic kit, I assume you at least have an OTO basic kit, or strips?
    Strips are horrid and almost like guessing, but a little better than completely guess. Just keep doing what you have been doing for the most part.

    Then....
    Once you get your kit, then you can run a set of full numbers, post them here and we will gladly get you pointed in the right direction.

    I like the following links for helping to understand the ins-outs of the kit.
    The 1st one can seem a little overwhelming at first, but it is a great tool to have handy for answering any testing questions you may have. Especially with the more complex ones, such as CYA, CH and so on. It covers so many different aspects of each test that it can really help you get the hang of each, gives you invaluable tips, etc..
    Extended Test Kit Directions
    Simplified One Page Testing Directions
    Also, I love this for pH testing, white background, arms length, where you can still see the shadow of the test block while done outdoors in daylight is your friend.
    2 Different pH Color Interpretations for getting SPOT ON RESULTS!!

    Have fun!! Soon you'll be in pool heaven.
    PS. If it were me and your weather allows, I would totally get your water cleared up before closing. Less to deal with in the spring, less headache if there's other mechanical problems at opening and you'll rest easy knowing all winter that the pool is just sitting there, happy, in limbo, awaiting spring.
    Not to mention it's faster to clear up algae in colder water temperatures than warmer temperatures and cheaper too, less CL loss during the day. Unless of course the sun goes crazy like it's summer, well, then at least you still have lower water temps to clear it up in.

    Lastly, where are you located? This helps us in diagnosing your water, temps, climate, etc..
    Please put this in your profile under location. Thx.
    Thanks for reading... - Tony
    Da' Pool: Intex 15'x42" 3284gal AGP EasySet (Inflatable Ring) - (Summer 2014: 27' round EW /w 6.5' deep end @ 22,500gal)
    Pump & Cart Mod: 1000gph Cart. 5ft² - 2 nylons, 24/7 OP. Traps bugs/bits, lasts longer/cleans easier = Happier Pool Owner!!
    The Bible for a "Trouble Free Pool" life = PoolSchool, the BBB method a TF100 test kit(Recommend Kits Compared). - Cleaning a Sand Filter
    Water looks like GLASS, if yours doesn't...SLAM IT! Feels nice and never been happier!!! :D

  11. Back To Top    #11

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    Re: Not sure what I have - algae?

    GA.
    15 x 25 AG (11,200 Gal)
    Sand
    1-1/2 HP Pump
    8 Year

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    Re: Not sure what I have - algae?

    Got the test kit in.
    PH: 7.8
    FC: 14.5
    CC: 0
    TA: 230
    CH: 220
    CYA: 60
    15 x 25 AG (11,200 Gal)
    Sand
    1-1/2 HP Pump
    8 Year

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    Re: Not sure what I have - algae?

    I need to also say that I will be out of town from Fri until Mon and I'm the only one working on this problem.
    15 x 25 AG (11,200 Gal)
    Sand
    1-1/2 HP Pump
    8 Year

  14. Back To Top    #14
    Mod Squad jblizzle's Avatar
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    Re: Not sure what I have - algae?

    You are not in too bad of shape. TA is high, but can be ignored for now. Also realize the pH test is inaccurate when FC > 10ppm.

    For a CYA of 60ppm, your shock FC level is 24ppm ... so try to keep it up there. Before you leave, make sure your FC is up to shock level and put a cover on the pool if you have one.
    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
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  15. Back To Top    #15

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    Re: Not sure what I have - algae?

    Thank you.
    15 x 25 AG (11,200 Gal)
    Sand
    1-1/2 HP Pump
    8 Year

  16. Back To Top    #16

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    Re: Not sure what I have - algae?

    Do I also need to scrub with brush? Or just add the bleach?
    15 x 25 AG (11,200 Gal)
    Sand
    1-1/2 HP Pump
    8 Year

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    Smykowski's Avatar
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    Re: Not sure what I have - algae?

    There is no such thing as "too much brushing," so do what you can.

    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

  18. Back To Top    #18
    y_not's Avatar
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    Re: Not sure what I have - algae?

    YEAAHHHH!! Glad to see you got your kit.
    Did you have fun running the tests?

    If it were my pool, being on vacation, I would bring it up to shock level and then add a bit on top of that.
    24ppm FC is shock level for 60 CYA, 35ppm FC is yellow mustard shock level. Bring it up to 24ppm tonight, do a few PPM more, so you have time to catch if before it dips below 24ppm. From then on out, watch it like a hawk and see how much you're loosing at frequent intervals, this way you know how high to go for when you're going to be gone. It's not an exact science, just hedging your bet really, hoping you get enough CL in there before you go for it to not dip too far down below shock level. Right before you leave, I would bring it up to about 30, then put a cover on it. If you're really loosing a lot, bring it up to mustard shock level, but no higher.

    If you have no cover, you're kinda out of luck. If that is the case, I would just wait to start the shock process till you return. Because if you drop too far below shock, for too long while you're gone, you can potentially loose all the ground you have gained and have to start all over, any algae you have killed up to that point will re-grow and then some and all your bleach you have dumped in will have been wasted. That's no fun. =\
    Thanks for reading... - Tony
    Da' Pool: Intex 15'x42" 3284gal AGP EasySet (Inflatable Ring) - (Summer 2014: 27' round EW /w 6.5' deep end @ 22,500gal)
    Pump & Cart Mod: 1000gph Cart. 5ft² - 2 nylons, 24/7 OP. Traps bugs/bits, lasts longer/cleans easier = Happier Pool Owner!!
    The Bible for a "Trouble Free Pool" life = PoolSchool, the BBB method a TF100 test kit(Recommend Kits Compared). - Cleaning a Sand Filter
    Water looks like GLASS, if yours doesn't...SLAM IT! Feels nice and never been happier!!! :D

  19. Back To Top    #19

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    Re: Not sure what I have - algae?

    Do I need to run all the tests everyday or at this point can I just run the Chlorine? And, should I filter to waste what's on the bottom or wait until...?
    15 x 25 AG (11,200 Gal)
    Sand
    1-1/2 HP Pump
    8 Year

  20. Back To Top    #20

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    Re: Not sure what I have - algae?

    I tested this AM for FC: 28 and CC: .5
    Also. I printed the notes from this website on tips for testing water. It said for water <70deg to let it warm up. How do you warm it up?
    15 x 25 AG (11,200 Gal)
    Sand
    1-1/2 HP Pump
    8 Year

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