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Thread: I need help with algae!

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    Hwilliams4's Avatar
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    I need help with algae!

    Every summer I spend a lot of time fighting algae. Most of the time it is wasted time. I have just purchased a Tf100 test kit and I'm ready to be in control of the algae. Can't wait for it to get here and get started. Help me!

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    Mr Bruce's Avatar
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    Re: I need help with algae!

    Let's see a full test then!

    How does your water look? Can you fill out your signature please with some details?
    32K gallon Plaster - CircuPool SJ-55 SWG - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL/K-1766
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    Re: I need help with algae!

    Following this. Hoping to begin my SLAM process this weekend, my kit just arrived.


    14,300 gallon Pebble Fina, gunite pool. 15 x 30 Rectangular, 3 1/2 on Shallow 6 on deep
    Pentair Sta-Rite system 3 cartridge filter
    Pentair Sta-Rite IntelliPro 4 x160 Four Speed Variable Pump
    Pentair SunTouch Control System
    TF100 Test Kit with SpeedStir

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    Mod Squad YippeeSkippy's Avatar
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    Re: I need help with algae!

    Please list your test results like this:

    FC
    CC
    pH
    TA
    CH
    CYA

    This way we can scan them quickly, and we're all using the same lingo for each test.

    Good job picking THE BEST test kit out there

    Yippee
    Maddie :) 12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Skippy's Pool Cooler --> Skippy's New Fountain Our Build --> Our Pool Solved Our Sloping Yard

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    Hwilliams4's Avatar
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    Re: I need help with algae!

    Ok, just got the test kit and updated my signature. Now to figure out how to get the testing done.
    Pool size: 15,000 gallons
    In-ground salt water
    Gunnite
    Intellichlor IC40
    Pentair clean and clear plus

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    Mod Squad YippeeSkippy's Avatar
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    Re: I need help with algae!

    Quote Originally Posted by Hwilliams4 View Post
    Ok, just got the test kit and updated my signature. Now to figure out how to get the testing done.
    Just take it one step at a time...each test.. read the instructions on the kit. Write down the results so you can start a record.
    I usually start with the pH, and don't use the other side of the block for chlorine because I'm going to run the FAS-DPD test instead. Then I do the FC/CC, TA, CH, CYA

    As you learn your pool you will be doing the pH, FC, CC test the most. The other ones less often or after any changes made (such as adding chems or draining H2O)

    Yippee
    Maddie :) 12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Skippy's Pool Cooler --> Skippy's New Fountain Our Build --> Our Pool Solved Our Sloping Yard

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    Re: I need help with algae!

    To make testing a little easier, I use a plastic squirt bottle, like you would use for ketchup at the restaurant, to collect the sample. Then you just squeeze in the amount needed without too much mess.
    Bob - INTEX 12x24 owner (not setup yet), 'New to me' Kreepy Krauly Sand Shark, Test kit: TF-100 w/Speed Stir

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    Hwilliams4's Avatar
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    Re: I need help with algae!

    FC- 9
    CC- .5
    pH- 7.8
    TA- 210
    CH- 1550
    CYA- 35
    Pool size: 15,000 gallons
    In-ground salt water
    Gunnite
    Intellichlor IC40
    Pentair clean and clear plus

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    Hwilliams4's Avatar
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    Re: I need help with algae!

    Great idea!
    Pool size: 15,000 gallons
    In-ground salt water
    Gunnite
    Intellichlor IC40
    Pentair clean and clear plus

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    Mod Squad YippeeSkippy's Avatar
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    Re: I need help with algae!

    Quote Originally Posted by Hwilliams4 View Post
    FC- 9
    CC- .5
    pH- 7.8
    TA- 210
    CH- 1550
    CYA- 35
    Ok, first thing i see is that a CYA of 35 is really 40. So during your SLAM that's a great place to be, but after its clear you'll want to raise that up for the SWG sake to 80.
    Is your CH *really* 1550?!?! How'd it get so high? Have you been using CalHypo along with having hard water or sumpthin??
    Only way to lower that is to drain some and refill. Is that something you can do?

    While your FC is below 10, go ahead and bring your pH down to 7.2 with some MA. Use PoolMath to tell you how much. (side benefit- it will also help lower that TA)

    Otherwise.... you understand the SLAM method, right?? SLAM

    Holler back with any other questions, we're happy to help.

    Yippee
    Maddie :) 12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Skippy's Pool Cooler --> Skippy's New Fountain Our Build --> Our Pool Solved Our Sloping Yard

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    Mod Squad YippeeSkippy's Avatar
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    Re: I need help with algae!

    Heather I want to confirm that when you did the CH test exactly how many drops did you add for the sample water change?

    Were you using the 10cc sample or the 25cc sample? (I'm old school, I use 25cc, 20 drops of R-0010<mix> then 5 drops of R-0011 <mix> then add the R-0012 one drop at a time until it doesn't change any further. Drop that last drop from your count and then multiply the number of drops by 200 <ie, double and add a zero>.)

    The math is easier for me when the sample is 25cc instead of the 10cc sample.

    Would you mind doing that one again, please? I am leery of having you invest too much time and cost of products on water *that* hard without double checking first.

    IF it really is that hard, you're going to have to drain significantly and refill or you'll be fighting against all that calcium to keep your pool nice.

    Thanks

    Yippee
    Maddie :) 12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Skippy's Pool Cooler --> Skippy's New Fountain Our Build --> Our Pool Solved Our Sloping Yard

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    Re: I need help with algae!

    Now that I have reread, I did it wrong. I did the 10 drops and 3 drops but did it in a 25 cc sample. I will retest in the morning. I was thinking that number was really high. Although we do have very hard water so I wasn't sure. Thanks again!! I will try again tomorrow.
    Pool size: 15,000 gallons
    In-ground salt water
    Gunnite
    Intellichlor IC40
    Pentair clean and clear plus

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    Re: I need help with algae!

    Yea, you may be hard, but 1550 is a bit high. No worries! Just re-do and get the hang of it. At this stage, you're worried more about getting rhe pH right and keeping the FC up anyway. Once we help you get this lined out, you'll be happy you decided to give this a try and you'll be amazed how easy this can be.
    TFP Moderator
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    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
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    Hwilliams4's Avatar
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    Re: I need help with algae!

    FC-9
    CC-.5
    pH-7.8
    TA-210
    CH-500
    CYA-35
    Pool size: 15,000 gallons
    In-ground salt water
    Gunnite
    Intellichlor IC40
    Pentair clean and clear plus

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    Mod Squad YippeeSkippy's Avatar
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    Re: I need help with algae!

    Quote Originally Posted by Hwilliams4 View Post
    FC-9
    CC-.5
    pH-7.8
    TA-210
    CH-500
    CYA-35
    Good day Heather So until you crank up that SWG after the SLAM, treat your pool as if its a Non-SWG pool and using this chart FC/CYA Chart you need to bring your FC up to 16ppm (since your CYA is really 40) and keep re-testing and re-dosing with bleach to keep it at 16ppm until its clear.

    But first you need to use Muriatic Acid to lower your pH to 7.2.. I just tapped your pool numbers into the PoolMath app <top of page> and it says to lower your pH you need to add 74 ounces of 31.45% muriatic acid. You can find that stuff in the paint section or pool section of the hardware store. Keep your head upwind from it cause it has a powerful vapor punch. Pour it slowly in a thin stream in front of a return with the pump running to help dilute it quickly in the pool. I always brush immediately after too in the spot I poured. Give it an hour and retest the pH and you should be on the money (or close enough).

    Then get started on that SLAM gurrrl!

    Yip
    Maddie :) 12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Skippy's Pool Cooler --> Skippy's New Fountain Our Build --> Our Pool Solved Our Sloping Yard

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    Hwilliams4's Avatar
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    Re: I need help with algae!

    So I will turn the swg off? Pour the bleach in at night and check in the morning? Do it again the next night if needed? Do you have an idea of how much I should start with? And every morning check the fc again? I'm all over the place. Just want to make sure I understand before I start.
    Pool size: 15,000 gallons
    In-ground salt water
    Gunnite
    Intellichlor IC40
    Pentair clean and clear plus

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    Re: I need help with algae!

    Hwillaims you and I are on the same path. Draining 60% of my pool now. Maybe we will get through this together this weekend! Cheers!


    14,300 gallon Pebble Fina, gunite pool. 15 x 30 Rectangular, 3 1/2 on Shallow 6 on deep
    Pentair Sta-Rite system 3 cartridge filter
    Pentair Sta-Rite IntelliPro 4 x160 Four Speed Variable Pump
    Pentair SunTouch Control System
    TF100 Test Kit with SpeedStir

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    Re: I need help with algae!

    Quote Originally Posted by Hwilliams4 View Post
    So I will turn the swg off? Pour the bleach in at night and check in the morning? Do it again the next night if needed? Do you have an idea of how much I should start with? And every morning check the fc again? I'm all over the place. Just want to make sure I understand before I start.
    If you are just starting the SLAM, you need to test and dose often. Like every hour or so. Pool math at the top of the page, will tell you how much to put in.
    Bob - INTEX 12x24 owner (not setup yet), 'New to me' Kreepy Krauly Sand Shark, Test kit: TF-100 w/Speed Stir

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    Re: I need help with algae!

    Pabeader is right.

    Ideally during a SLAM, you're FC would never drop below the suggested range for your Cya level. If you can get as close to that as possible, that is your goal. Perhaps you can try doing this over the weekend, or watching it very closely and adding as needed. The less it falls below target, the faster it will go.
    TFP Moderator
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    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

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    Mod Squad YippeeSkippy's Avatar
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    Re: I need help with algae!

    Heather I think you're a bit confuddled because at the *end* of a SLAM we ask folks to perform an Overnight Chlorine Loss Test (OCLT) to confirm that in the dark when there is no UV light on the pool to eat chlorine, and if in the morning they lost only 1ppm or less, they've passed that test.

    You are just starting the SLAM process. Here it is again--> SLAM

    Ideally you will wake up early today and run a pH, FC and CC tests only, then bring your pH down to 7.2 with the muriatic acid. As soon as that is mixed in, you want to add as much chlorine as it takes to get you up to SLAM level. Your SLAM at 30ppm is 12ppm chlorine. Use Pool Math to tell you how much to add. Pour that in (in front of a return) then brush the pool. Go have a fast breakfast and come back and retest just the FC. If it now says 10ppm (for example) you're going to ask PoolMath to tell you how much clorine to add to go from 10 to 12 again. Do this as often as possible (even hourly) and your SLAM will go fastest.

    At bed time tonight do your last test of FC for the night and put the bleach in, then wake up early tomorrow and repeat.... until the pool is clear and free of algae.

    Then we'll talk you thru the final steps to end it.

    Got that??

    Yip
    Maddie :) 12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Skippy's Pool Cooler --> Skippy's New Fountain Our Build --> Our Pool Solved Our Sloping Yard

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