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Thread: New-ish pool turning green. HELP Please!

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    Adiharce's Avatar
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    New-ish pool turning green. HELP Please!

    We have had our pool since March and since May I have been struggling with the pool turning green (not swamp green, but not pretty clear water).
    I tried using bleach for a week, but was having to add so much that I have gone back to chlorine tabs, which I know lead to higher levels of CYA. Would like to go back to something without the added stabilizer, but not sure what steps to take. I am new to the TFP method and would really appreciate some guidance.

    Here is my info as well as I understand it.
    In ground plaster pool with a spa. Sand filter.
    17,000 gallons.

    Numbers yesterday were:
    FC: 5.0
    CC: 1.0
    TC: 6.0
    CH 275
    TA: 130
    CYA:90
    PH: 7.8

    I added 22 oz muriatic acid per pool math instructions. 8 hrs prior to testing yesterday I added a bag of shock that we had on hand.

    Today's numbers:
    FC: 3
    CC:1
    TC 4
    PH: 7.5
    CH: 300
    TA: 100
    CYA: 100

    I have small patches of green algae on the limestone steps and seat in the pool. No algae in the spa. The algae scrubs off easily with a wire brush.

    Do I need to SLAM? When I read the CYA/Chlorine chart and it has shock level of 39, does that mean that my FC needs to be at 39? Is this going to be an ongoing problem due to CYA levels? Also, why is CYA level so high after only 4 months of pool operation? Can the tablets cause that much build up in 4 months. I am hesitant to drain the pool at this point as we are in drought restrictions and I believe will incur a hefty surcharge if we refill. I would appreciate any help that you can offer!

    Pool 1.JPGPool 2.JPG
    Alex D.
    AG, 17500 gal, Plaster, Sand Filter,Pentair WhisperFlo Pump
    Polaris, Master Temp 400 Pool and Spa Heater
    Pentair Chlorine Automatic In-Line feeder

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    Re: New-ish pool turning green. HELP Please!

    Your CYA is the major culprit. It has gotten so high that the lower FC of 5 is not effective. My suggestion is to drain half the water and get the CYA down before you do anything.

    Your math is correct, you would need a minimum shock level of 39 to perform the SLAM process. Keep in mind, the M is for MAINTAIN. It is going to take a lot of bleach at first to maintain a minimum of 39.

    Yes, tablets are the cause of the high CYA.

    I don't know about your situation in San Antonio, but here they had no complaints when I refilled my pool. Draining half of your pool and refilling would take 8500 gallons, which is nothing compared to filling a 44,000 gallon 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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    Butterfly's Avatar
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    Re: New-ish pool turning green. HELP Please!

    Welcome to TFP

    How did you get those test results? Do you have your own test kit? Which one?

    You should not add any powders, granular, pucks type chlorine anymore for now! Use only plain bleach/liquid chlorine.

    First, did you do the dilution CYA test? The CYA test will test 100 as 100 and anything above 100 also as 100 So, the dilution test will let us know about how much you need to drain. That should be the first step; scroll down to post #8, item # 9:
    http://www.troublefreepool.com/threa...Kit-Directions
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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    Adiharce's Avatar
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    Re: New-ish pool turning green. HELP Please!

    I purchased the TF-100 test kit.
    I will perform the dilution test now and see what I get.
    Alex D.
    AG, 17500 gal, Plaster, Sand Filter,Pentair WhisperFlo Pump
    Polaris, Master Temp 400 Pool and Spa Heater
    Pentair Chlorine Automatic In-Line feeder

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    Re: New-ish pool turning green. HELP Please!

    To add to what was said above, when buying bleach, make sure it's just plain bleach. Nothing scented, low slosh, outdoor, etc.
    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
    If TFP has helped you, please click to SUPPORT TFP!

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    Adiharce's Avatar
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    Re: New-ish pool turning green. HELP Please!

    I completed the CYA procedure, but with the dilution and got 50. So I am thinking drain 50% of the pool. Seems so wrong for a 4 month old pool. Could the builder possibly have added too much stabilizer at set up?

    Not sure what happened to my previous reply, but I have the TF-100 test kit. Just got it yesterday!
    Alex D.
    AG, 17500 gal, Plaster, Sand Filter,Pentair WhisperFlo Pump
    Polaris, Master Temp 400 Pool and Spa Heater
    Pentair Chlorine Automatic In-Line feeder

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    Re: New-ish pool turning green. HELP Please!

    PB could added too much stabilizer, and if you used powdered shock products and/or any tablets, that adds to the problem. The PBs tend to really not know as much as they say they do. They added stabilizer to mine when it was complete, but they arbitrarily added about 5 lbs of stabilizer to my skimmer, which wasn't anywhere near enough to stabilize my large pool. In other words, they just know to add stabilizer, but don't know how much.
    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
    If TFP has helped you, please click to SUPPORT TFP!

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    Adiharce's Avatar
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    Re: New-ish pool turning green. HELP Please!

    Thanks. Going to drain pool later today and hope for the best.
    Alex D.
    AG, 17500 gal, Plaster, Sand Filter,Pentair WhisperFlo Pump
    Polaris, Master Temp 400 Pool and Spa Heater
    Pentair Chlorine Automatic In-Line feeder

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    Re: New-ish pool turning green. HELP Please!

    You are lucky your CH is 300. San Antonio water is pretty hard.
    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
    If TFP has helped you, please click to SUPPORT TFP!

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    Re: New-ish pool turning green. HELP Please!

    Once you complete the drain/refill dance, circulate the water for at least several hours before testing again.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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    Adiharce's Avatar
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    Re: New-ish pool turning green. HELP Please!

    Almost done draining 60% of pool. After I let water circulate a couple of hours and check chemicals do I then just start with TFP method?

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    Re: New-ish pool turning green. HELP Please!

    Yes. Whatever you are thinking of adding to the pool for chemicals try to post it here first. It's so much easier having you not put it in to begin with rather than trying to counteract it later

    Please add your pool info to your signature as outlined here: http://www.troublefreepool.com/conte...etting-started

    Once it's circulated and you retest ..
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
    Solar Blanket, Well Water, Borax Added, TF-100 tester. ? too cold
    1979, 275gal Conway Emerald Spa P-100-2, ES-2 Spa Pack, bromine floater, indoor
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    Adiharce's Avatar
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    Re: New-ish pool turning green. HELP Please!

    Pool finished filling and circulated.

    New Numbers:
    PH: 7.5
    FC: 0
    CH: 250
    TA: 160
    CYA: 35-40

    Pool math indicates to add 106 oz bleach.
    NOthing really indicated about TA. Is that correct?

    Any other suggestions?
    Alex D.
    AG, 17500 gal, Plaster, Sand Filter,Pentair WhisperFlo Pump
    Polaris, Master Temp 400 Pool and Spa Heater
    Pentair Chlorine Automatic In-Line feeder

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    Re: New-ish pool turning green. HELP Please!

    Add the bleach. Wait 30 minutes and test FC and CC and report back

    yes, ignore TA for now.

    - - - Updated - - -

    In fact, add enough bleach to reach 10FC. That will be a nice start.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: New-ish pool turning green. HELP Please!

    And during the SLAM you'll likely be over 10ppm FC and above that the pH isn't reliable so you don't need to test it until the slam is done. Save your chems !!

    - - - Updated - - -

    Yup, checked pool math and you'll likely be 16ppm for SLAM so don't worry about pH.
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
    Solar Blanket, Well Water, Borax Added, TF-100 tester. ? too cold
    1979, 275gal Conway Emerald Spa P-100-2, ES-2 Spa Pack, bromine floater, indoor
    TF-100, Best test kit - TFTestkits.net
    Please help keep the lights on, become a TFP Supporter!

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    Adiharce's Avatar
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    Re: New-ish pool turning green. HELP Please!

    Updated testing:
    FC: 15
    CC: 0
    TC: 15

    Next step?

    Also, can we swim with the FC that high?
    Alex D.
    AG, 17500 gal, Plaster, Sand Filter,Pentair WhisperFlo Pump
    Polaris, Master Temp 400 Pool and Spa Heater
    Pentair Chlorine Automatic In-Line feeder

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    Re: New-ish pool turning green. HELP Please!

    You can swim in water UP TO Slam level. Enjoy
    17500 Gal Above Ground, 1.5HP Dynamo Pump, 250# Pentair Sand filter with ZeoLite. Diver Dave Cleaner. TFP test kit w/SpeedStir, 7 Grandaughters and 1 Grandson swimming every week WooooHooo!!

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    Re: New-ish pool turning green. HELP Please!

    Brush often, backwash when pressure reaches 20% above normal post backwash readings, Next step is to take FC readings after dark and compare the next morning before sunrise. If the change is 1ppm or less, CC is <.5ppm, and water is clear then you can stop and let the FC drop to target level and then post results for all reading for advice on what to adjust next if anything. Read this if you haven't : SLAM LINK
    26k gal, IG, Pebble Tec, DE filter/48sq'/144 GPM, 3hp Intelliflo running @ <1400 rpm 24/7

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    Re: New-ish pool turning green. HELP Please!

    Quote Originally Posted by ranger_ric View Post
    You can swim in water UP TO Slam level. Enjoy
    You can swim up to SLAM level provided you can see the bottom of the pool for safety reasons.

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    Re: New-ish pool turning green. HELP Please!

    Quote Originally Posted by Adiharce View Post
    Updated testing:
    FC: 15
    CC: 0
    TC: 15

    Next step?

    Also, can we swim with the FC that high?
    As mentioned, you can swim up to normal shock level as long as the pool is clear enough that you can see someone on the bottom.

    Is the water clear?

    If yes, you can do the OCLT test tonight.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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