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Thread: Always have algae on floor?

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    88rxn/a's Avatar
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    Always have algae on floor?

    Hello,
    Even though I keep my parameters in check, I always find a little algae on the floor of my pool? the waters crystal clear when I take off my solar cover but the floor isnt?
    I sweep it and it's gone until a few days later. I had this problem last year too and I tried slamming the pool and even passed the overnight test, same as this year?
    I run my filter 4 hours every day on a timer and add my bleach every day.
    What gives?

    fc 4
    Ph 7.2
    Ta 70
    Salt 1,100

    Also, no matter how much borate I add ( I use the calculator and add the recommended amount) I cannot get my ph up.
    I have tried 3 times in the last week. I even tried a different test kit with the same results.
    24X4 round vinyl liner 160 jacuzzi sand filter

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    Mod Squad JVTrain's Avatar
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    Re: Always have algae on floor?

    How often are you brushing your pool and running a pool cleaner/robot? Weekly brushing of the entire pool at a minimum is required, even if your running a cleaner. The cleaner can help improve circulation if it is run daily or a couple times per week. What is your CYA level?
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
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    Re: Always have algae on floor?

    Quote Originally Posted by 88rxn/a View Post
    Hello,
    Even though I keep my parameters in check, I always find a little algae on the floor of my pool? the waters crystal clear when I take off my solar cover but the floor isnt?
    I sweep it and it's gone until a few days later. I had this problem last year too and I tried slamming the pool and even passed the overnight test, same as this year?
    I run my filter 4 hours every day on a timer and add my bleach every day.
    What gives?

    fc 4
    Ph 7.2
    Ta 70
    Salt 1,100

    Also, no matter how much borate I add ( I use the calculator and add the recommended amount) I cannot get my ph up.
    I have tried 3 times in the last week. I even tried a different test kit with the same results.
    How are you testing, & what is your CYA level?

    Please post a complete set of test results including:
    FC
    CC
    PH
    TA
    CH
    CYA

    I would leave the PH where it is right now, 7.2 is perfect for a SLAM, and with visible algae, you need to SLAM the pool.

    Dom
    Dom - TFP Guide
    Intex 18' X 48" Ultra Frame AGP 6700 gallons | Two Intex CS8110 SWG's | Hayward Pro Series 21" Sandfilter | Hayward 1.5HP Power Flo Matrix pump | Hayward Thru-wall Skimmer | Wanda the Whale | 72 sq ft of Sungrabber Solar Panels with Hayward GLC-2P-A | Taylor K2006 Test Kit, Sample Sizer & Speed Stir | Click Here To Become a TFP Supporter!

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    88rxn/a's Avatar
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    Re: Always have algae on floor?

    oops, sorry

    CYA 70
    FC 4
    PH 7.2
    TA 70
    CH 230
    CYA 70

    using a TF-100
    i have (i think its the name of it) a shark i only use on occasions, but i brush the pool at least once or twice a week before we swim.
    24X4 round vinyl liner 160 jacuzzi sand filter

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    Re: Always have algae on floor?

    Your FC is too low for your CYA. That is going to allow algae to grow. See Pool School - Chlorine / CYA Chart

    To get rid of the algae will require SLAM process.

    Also on the PH, you say you are adding borates but in what form? Borax will raise your PH while I don't believe boric acid will.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
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    88rxn/a's Avatar
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    Re: Always have algae on floor?

    Wouldn't I go by the swg's fc goal since I added salt?
    I'm currently around 1,100.
    I am using the 20 mule team to try and raise my ph.

    24X4 round vinyl liner 160 jacuzzi sand filter

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    Mod Squad tim5055's Avatar
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    Re: Always have algae on floor?

    Quote Originally Posted by 88rxn/a View Post
    Wouldn't I go by the swg's fc goal since I added salt?
    I'm currently around 1,100.
    I am using the 20 mule team to try and raise my ph.

    Sent from my SCH-I545 using Tapatalk
    Do you have a salt water chlorine generator? It's not listed in your signature.

    You are going to have to SLAM the pool, so leave the pH where it is. That is the starting point for a SLAM
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    88rxn/a's Avatar
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    Re: Always have algae on floor?

    No I don't have a salt generator. I use the blue solar salt bags.
    Judging by everyone's answer I'm slamming. ..lol
    I was under the impression that if I had salt in the pool it requires less chlorine? Am I wrong?
    If so, what's the difference from having a salt generator and just adding the salt from bags as far as the chlorine goes?

    24X4 round vinyl liner 160 jacuzzi sand filter

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    Mod Squad tim5055's Avatar
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    Re: Always have algae on floor?

    Quote Originally Posted by 88rxn/a View Post
    No I don't have a salt generator. I use the blue solar salt bags.
    Judging by everyone's answer I'm slamming. ..lol
    I was under the impression that if I had salt in the pool it requires less chlorine? Am I wrong?
    If so, what's the difference from having a salt generator and just adding the salt from bags as far as the chlorine goes?

    Sent from my SCH-I545 using Tapatalk
    Nope, just adding salt to the water does not decrease the need for chlorine. The salt generator is a device that converts the salt in the water to chlorine. It is a common misconception that a salt pool is not a chlorine pool.

    Right now you have salty water, but still need to add chlorine.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: Always have algae on floor?

    Quote Originally Posted by 88rxn/a View Post
    No I don't have a salt generator. I use the blue solar salt bags.
    Judging by everyone's answer I'm slamming. ..lol
    I was under the impression that if I had salt in the pool it requires less chlorine? Am I wrong?
    If so, what's the difference from having a salt generator and just adding the salt from bags as far as the chlorine goes?

    Sent from my SCH-I545 using Tapatalk
    A salt water generator creates chlorine from salt in the water. If you are not chlorinating that way, you need to be chlorinating with liquid bleach as other dry forms of chlorine add unnessary things to your pool like calcium or CYA. Your CYA is already on the high side for a non saltwater (SWG chlorinated) pool so your chlorine should never drop below 5 or you have an open door invitation for an algae party in your pool.

    See the link I posted above for the chlorine CYA chart. You can click on pool school too and read up on ABC's of pool water chemistry.

    To rid the algae, you do need to slam then to keep it from coming back you need to keep your chlorine from falling below the minimum for your CYA.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
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    88rxn/a's Avatar
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    Re: Always have algae on floor?

    thanks everyone!
    i am very well aware of the charts and how they work. what i did not know was that the salt water generators actually produced chlorine for pools!
    that's what had me so confused. i thought for sure i was supposed to use the SWG chart since i had "salt" in my pool!! hahahahahha!! boy do i feel silly!
    little did i know...
    live and learn i guess.
    24X4 round vinyl liner 160 jacuzzi sand filter

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    Re: Always have algae on floor?

    Now slam that pool 👍
    32x16 inground chlorine. 23000 gallon with diving board
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    maytronics dolphin m200 robot. I live in central NY.
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    88rxn/a's Avatar
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    Re: Always have algae on floor?

    Still slamming!
    I was wrong on my cya, it is only 30. I was starting to get a little cloudy when I posted this but it's crystal clear again with a little algae on the floor every day when I remove the solar cover. I brush it all the replace the cover. And make sure I'm still at shock level and adjust it when needed.

    So I still have algae on the floor. I wonder how long it's gonna take?

    24X4 round vinyl liner 160 jacuzzi sand filter

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    88rxn/a's Avatar
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    Re: Always have algae on floor?

    An hour after I sweep the floor this algae is right back!?
    Am I doing something wrong?

    24X4 round vinyl liner 160 jacuzzi sand filter

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    Re: Always have algae on floor?

    How do you know it is algae?

    Have you done the overnight chlorine loss test?
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    Re: Always have algae on floor?

    Quote Originally Posted by 88rxn/a View Post
    An hour after I sweep the floor this algae is right back!?
    Am I doing something wrong?

    Sent from my SCH-I545 using Tapatalk
    How's your CC level? How many ppm of FC do you lose between tests/doses?

    How about posting a full set of test results.

    How well are you holding SLAM FC shock level? The longer you can keep the pool at shock level the quicker you kill algae.

    It's good that you brush to expose any algae to the chlorine. Keep it up and brush as often as you can.

    You're running the pump & filter 24/7, right?

    Stay the course, you can beat this!

    Dom
    Dom - TFP Guide
    Intex 18' X 48" Ultra Frame AGP 6700 gallons | Two Intex CS8110 SWG's | Hayward Pro Series 21" Sandfilter | Hayward 1.5HP Power Flo Matrix pump | Hayward Thru-wall Skimmer | Wanda the Whale | 72 sq ft of Sungrabber Solar Panels with Hayward GLC-2P-A | Taylor K2006 Test Kit, Sample Sizer & Speed Stir | Click Here To Become a TFP Supporter!

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