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Thread: Green algae

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    Green algae

    My neighbor has a green swamp. Cya was 50. Took FC level to 20. Can see the bottom steps after 24 hours. Rechecked cya. Cya is a solid 65. Stopped using tabs. Taking FC level to 28. Any suggestions. Right now. fc 20 cc 2.5 ph 7.4 alk. 80
    25K Vinyl In ground, 1 1/2 hp Hayward Super pump, Hayward Pro Series 300 lb s224T Sand filter, Hayward H150 Gas heater. Aqua bot Turbo Cleaner FC 2-3, Cya 10, PH 7.4, TA 60, CH 30

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    JasonLion's Avatar
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    Re: Green algae

    It sounds like you are doing a good job so far.

    Have you been brushing the pool to make sure you get any biofilms off the surface?

    How has the filter been behaving? Has it needed backwashing/cleaning?
    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

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    Re: G*reen algae

    He has been backwashing to much i believe. Filter has always made a noise. Stopped backwashing. Pool 2 years old. No unions to take filer apart to look inside. Next project. Filter may need cleaned. Cc this morning 1. Last night he only raised fc to 22. This morning we raised it to 30. Cya 65 + 40 hours so far trying to clean up. Pool was put up last winter with algae in it. Clarity only to bottom step. Inground pool 30,000 gallon. He is losing faith in the bbb method. Any suggestions?? So far 50 gallons of bleach. 6% i don't think we was at the right shock level.
    We thought cya was closer to 50, haven't seen algae turn gray yet either.
    25K Vinyl In ground, 1 1/2 hp Hayward Super pump, Hayward Pro Series 300 lb s224T Sand filter, Hayward H150 Gas heater. Aqua bot Turbo Cleaner FC 2-3, Cya 10, PH 7.4, TA 60, CH 30

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    JasonLion's Avatar
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    Re: Green algae

    It hasn't even been two days yet and you are working on a massive amount of algae. If you can already see to the bottom step you are doing very very well.

    Algae doesn't always turn gray. Sometimes it just turns a less saturated green.

    The filter is doing a lot of work right now. It needs to be cleaned or backwashed appropriately, depending on what kind of filter it is.
    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

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    Mod Squad Bama Rambler's Avatar
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    Re: Green algae

    Time to break out the NOPOP (Neighbor of Pool Owner Patience).

    As Jason said, it's only been 2 days. And if the shock level wasn't kept high enough it would have slowed down the process a bit.

    Post your neighbors equipment in a post so we can see what you're dealing with.

    Oh, and keep on shocking!
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: Green algae

    AS an aside, like most all of us, you are excited and willing to share your newfound expertise with pool water management but don't be surprised if your efforts go unrewarded.

    Unless your neighbor joins TFP and learns for himself, he will very probably go back to doing whatever he was doing before.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Green algae

    30K Vinyl In ground, 1 1/2 hp Hayward Super pump, Hayward Pro Series 300 lb s224T Sand filter
    25K Vinyl In ground, 1 1/2 hp Hayward Super pump, Hayward Pro Series 300 lb s224T Sand filter, Hayward H150 Gas heater. Aqua bot Turbo Cleaner FC 2-3, Cya 10, PH 7.4, TA 60, CH 30

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    Re: Green algae

    CC are gone. Hopefully final shock tonight. FC change less than 1 overnight.(I hope) Water is still green but getting better. How do I clarify the water? Everything look good except the clarity.
    25K Vinyl In ground, 1 1/2 hp Hayward Super pump, Hayward Pro Series 300 lb s224T Sand filter, Hayward H150 Gas heater. Aqua bot Turbo Cleaner FC 2-3, Cya 10, PH 7.4, TA 60, CH 30

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    JasonLion's Avatar
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    Re: Green algae

    The filter will clear up the water, though it may take a while. If you are in a huge hurry you could try a floc treatment, but that requires that you be able to vacuum to waste and takes a fair bit of effort.
    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

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    Re: Green algae

    How is floc treatment done
    25K Vinyl In ground, 1 1/2 hp Hayward Super pump, Hayward Pro Series 300 lb s224T Sand filter, Hayward H150 Gas heater. Aqua bot Turbo Cleaner FC 2-3, Cya 10, PH 7.4, TA 60, CH 30

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    JasonLion's Avatar
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    Re: Green algae

    You add floc (a generic name for various chemicals you can get from the pool store), circulate the water for an hour, then turn the pump off for 24 hours. By then everything should have settled to the bottom and can be vacuumed up to waste. You need to be very careful with the vacuum not to disturb the stuff on the bottom so it won't just get mixed back into the water. You lose a lot of water this way, so you need to be efficient at vacuuming even while moving slowly to keep from stirring things up.
    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

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    Re: Green algae

    Thanks for info
    25K Vinyl In ground, 1 1/2 hp Hayward Super pump, Hayward Pro Series 300 lb s224T Sand filter, Hayward H150 Gas heater. Aqua bot Turbo Cleaner FC 2-3, Cya 10, PH 7.4, TA 60, CH 30

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    Re: Green algae

    Does your fc level need to be normal to add floc? FC right now is 25
    25K Vinyl In ground, 1 1/2 hp Hayward Super pump, Hayward Pro Series 300 lb s224T Sand filter, Hayward H150 Gas heater. Aqua bot Turbo Cleaner FC 2-3, Cya 10, PH 7.4, TA 60, CH 30

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    JasonLion's Avatar
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    Re: Green algae

    Some kinds of floc require the PH to be adjusted, but I believe that all of them work at high FC levels. They vary a little bit, so check the directions on the package.
    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

  15. Back To Top    #15

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    Re: Green algae

    Changed sand in filter used floc in filter 2 days ago.Filter increased 8 lbs,backwash and added more floc. Pressure is now up only 2 lb after 24 hours. Water is real shinny on top. Water is still light green in shallow end. ph: 7.4 AlK:60 FC: 4 CC:0 Loses less the 1 FC over night. Water is still light green. It took around 70 3 qt. bottles of bleach to kill algae. When FC came down cya came down from 60+ to 30?? Can barely see shallow end bottom 4ft deep. Liner feels completely clean. Turbo cleaner picks up nothing. What ever is in the water is going through filter. Put Super clarifier in water 2 days ago. Helped a little not much. Could the green been from the bleach? What now?
    25K Vinyl In ground, 1 1/2 hp Hayward Super pump, Hayward Pro Series 300 lb s224T Sand filter, Hayward H150 Gas heater. Aqua bot Turbo Cleaner FC 2-3, Cya 10, PH 7.4, TA 60, CH 30

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    Re: Green algae

    No CC is a good sign. Might be a good time to see if the FC holds overnight.

    If the water in the deep end is still green, I wonder if it is algae or perhaps metals. With all those floccs and clarifiers in there now, there's no telling what is in that water now. That's why we don't advise people to use them. They aren't usually, if ever, indicated.

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