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Thread: New Member with an algae problem

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    New Member with an algae problem

    Hello,

    Like most people, a problem with the pool brought me to this site. The pool is less than a year old and I find myself battling an algae problem. A couple of days ago I found some yellow/green spots on the walls/steps. They went away with some brushing but returned the next day. Woke up today to a greenish tint to the water. Aside from this algae problem, I have been fighting tons of dirt/sand getting blown into the water. The high winds combined with a yard that isn't completely landscaped has me fighting an uphill battle. Luckily, sod will be going in this week so this shouldn't be an issue going forward. After doing some reading here, it seems I need to SLAM the pool. A K-2006 test kit is on the way and should be here tomorrow. To get ready for the SLAM, I bought 8 gallons of 10% and had my water tested at the pool store. THe results were:

    FC - 3
    TAC - 3
    CH - 200
    CYA - 80
    TA - 110
    pH - 7.8
    Pho - 750

    I don't know how accurate these readings are though. I tested the water with the basic kit I have and found the TA to be 80 and the pH to be 7.6. Also, the CYA level seemed to be higher than what I expected. The PHOSFree product was recommended, but I decided to hold off on that for now. I would hate to dump stuff in there that isn't really needed.

    So... my question is... How much liquid chlorine can/should I add until I receive the K-2006 test kit? Whether I add any liquid chlorine today or not, I plan on vacuuming, sweeping, and cleaning the filters. Hopefully I can get this thing straightened out before Labor Day.

    Thanks in advance!
    35,049 gal in ground free form pool, Jandy CL580 Cartridge filter, Jandy SHPF2.0-0 pump, Chlorine

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    Mod Squad woodyp's Avatar
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    Re: New Member with an algae problem

    Lower your PH first. I'd be scared to go any father than a SLAM level of FC for your CYA at 50 until you get your test kit. One day won't kill it either way.
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    Re: New Member with an algae problem

    Thanks. I forgot to mention that I added acid to lower the pH prior to having the water tested at the store. The sample I took to the store was taken before I added the acid. I'll recheck it again, but it should be 7.4.
    35,049 gal in ground free form pool, Jandy CL580 Cartridge filter, Jandy SHPF2.0-0 pump, Chlorine

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    Re: New Member with an algae problem

    Get your kit and stay out of the pool store. You will be hopelessly confused if you decide to "double check" your results.

    Nobody cares about your pool as much as you do.

    You can safely add 1 gallon daily to that size pool until you get your kit and provide accurate testing.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: New Member with an algae problem

    Quote Originally Posted by duraleigh View Post
    Get your kit and stay out of the pool store. You will be hopelessly confused if you decide to "double check" your results.

    Nobody cares about your pool as much as you do.
    That is my plan. Hopefully the kit shows up early in the day so I can get the accurate results posted up here. Until then, I will go ahead with adding one of the gallons. I want to get on top of this thing before it turns into a lagoon.

    Is the phosphate level they came up with worth worrying about? Or is it something that is secondary to clearing up the water?
    35,049 gal in ground free form pool, Jandy CL580 Cartridge filter, Jandy SHPF2.0-0 pump, Chlorine

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    Re: New Member with an algae problem

    Ok, I got my K-2006 test kit today. Just tested and these were the results:

    FC 4.6
    CC 0.4
    PH 7.6
    TA 110
    CYA 80
    CH 290

    I'm surprised the CYA is as high as it is since the pool is only 9 months old. My pool is set up with an inline tablet chlorinator that I usually don'k keep all the way full. All I can guess is that too much conditioner was added by the builder during the initial set up. I'll try to find my first print out from the pool store. I'm guessing I need to lower the CYA before starting to SLAM. Is it safe for the plaster to drain over a third of the pool when it is this new?
    35,049 gal in ground free form pool, Jandy CL580 Cartridge filter, Jandy SHPF2.0-0 pump, Chlorine

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    Mod Squad pooldv's Avatar
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    Re: New Member with an algae problem

    It is fine to SLAM with CYA at 80, I did it last summer. It is just the initial dose to get to shock level that is big, after that it will use the same amount of chlorine as it would have with CYA at 30.

    Phophates are not important in TFPC.
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    Re: New Member with an algae problem

    Thanks for the reply. After adding a gallon of chlorine yesterday and again today, the green tint to the water is gone. Still have the algae on the walls though. I plan on doing the SLAM later this week when I have the time to be around the pool. Until then, I'm going to retest and add enough to get the FC to 9.
    35,049 gal in ground free form pool, Jandy CL580 Cartridge filter, Jandy SHPF2.0-0 pump, Chlorine

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    Re: New Member with an algae problem

    Until then, testing and adding morning and night, just twice daily, would be helpful if you can.

    Did you empty the inline tablet chlorinator?
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    Mod Squad kimkats's Avatar
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    Re: New Member with an algae problem

    The tablets are where your CYA is coming from. Each tablet adds some. Over time it builds up. The only way to get rid of CYA is to drain water and add new. Please take the tablets out of the inline. Do not just turn it off as that allows the water inside to get very full of the dissolved tablet and will cause problems in the long run.

    You can keep your CYA where it is at. It will take more chlorine to clear your algae is all.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: New Member with an algae problem

    So far, I have just closed the valve so it doesn't fill with water. I'll have to try to fish them out somehow since they stack on top of one another in a column.

    I will probably start with CYA at the current level. If I decide to drain some water, is there anything I need to worry about with newer pool?
    35,049 gal in ground free form pool, Jandy CL580 Cartridge filter, Jandy SHPF2.0-0 pump, Chlorine

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    Re: New Member with an algae problem

    Vinyl, plaster, pebble additive? What's the finish like?
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    Re: New Member with an algae problem

    Be careful with the inline chlorinator. As was said earlier, if it has water in it but no circulation the chlorine level gets very high. Don't have it sitting in hot sun and pop the top off with your face close to it. I was struggling with a sticky lid and got a face full of chlorine gas when it finally came off. Not an experience I'd care to repeat.
    16,500 gallon, 18" x 38" Grecian; IG Vinyl, Hayward DE

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    Re: New Member with an algae problem

    It is a plaster pool.

    - - - Updated - - -

    Quote Originally Posted by DorsalSpine View Post
    Be careful with the inline chlorinator. As was said earlier, if it has water in it but no circulation the chlorine level gets very high. Don't have it sitting in hot sun and pop the top off with your face close to it. I was struggling with a sticky lid and got a face full of chlorine gas when it finally came off. Not an experience I'd care to repeat.
    Yeah, I hear ya. I got all of the tabs out that I could without unbolting it from the cement. I opened the lid while the pump was on to make sure it wasn't filling up with water, and it was not. Figures I had to fill it completely just before switching to the TFP method. Oh well.
    35,049 gal in ground free form pool, Jandy CL580 Cartridge filter, Jandy SHPF2.0-0 pump, Chlorine

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    Re: New Member with an algae problem

    Okay so newer plaster pool. This is the last paragraph of the new plaster care page, which may apply to you depending on how new yours is:
    "No matter what start-up procedure is used, your pool will consume a lot of acid during the first 6-12 months as the plaster finish continues to cure. It is important to test your pH daily and do not let it climb above 7.8. Be sure to continue to brush the pool at least weekly during this period."

    Then there is this thread that, although old, has comments by some of this sites most expert members.

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