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Thread: Very Large pool with alot of algae - help!

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    Very Large pool with alot of algae - help!

    Topic Split Off by Moderator

    I am currently running a swimming pool of 188,000 gallons of water and now have an algea problem. Its green algea and I have been having people scrubbing and shocking the pool at night and it does not seen to be going away. I want to purchase an algecide but do not know what kind, help!

    SJ
    5000 gal AG with 1000gph (too small! walmart special) cartridge filter in Iowa

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    Re: Turning Your Green Swamp Back into a Sparking Oasis

    Quote Originally Posted by hillsswim
    I am currently running a swimming pool of 188,000 gallons of water and now have an algea problem. Its green algea and I have been having people scrubbing and shocking the pool at night and it does not seen to be going away. I want to purchase an algecide but do not know what kind, help!
    SJ
    You might want to post this as a separate topic. I can flag this so a moderator can decide about that.

    Meanwhile, the first thing you ought to do is to read Pool School. If you are running a pool that size, most of this will be stuff you know but since the CYA/chlorine relationships is not taught in most training, you may find some info that helps you tremendously.

    Where are you located? Sometimes that may affect what you can do; we get posts from all over the world it seems.

    Can you provide a full test; FC, CC, TC, pH, TA, CH, CYA.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

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    frustratedpoolmom's Avatar
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    Re: Very Large pool with alot of algae - help!

    Anona has given you good advice - you need to read Pool School and how to shock a pool properly. We need more info like what are you testing with, what are you shocking with, and what are your test results. In all likelyhood you probably aren't shocking high enough.

    Is the water clear, but you are seeing algae on the sides, etc? could be mustard algae which is resistant to "normal" levels of chlorine.

    So if you post back with more info we can advise you better.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    Nod's Avatar
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    Jun 2008
    Location
    Nashville, NC
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    69

    Re: Very Large pool with alot of algae - help!

    Quote Originally Posted by hillsswim
    Topic Split Off by Moderator

    I am currently running a swimming pool of 188,000 gallons of water and now have an algea problem. Its green algea and I have been having people scrubbing and shocking the pool at night and it does not seen to be going away. I want to purchase an algecide but do not know what kind, help!

    SJ

    You have to keep your shock levels up until the algae is killed off completely. You cannot just shock at night, as it will come back during the day. Are you using liquid chlorine? Also what does your CYA look like as that is the most important factor to know what the shock process is. I am betting it is higher than you realize and this is why algae started growing. Most home owners just forget to put chlorine in the pool, but as someone running a pool this is your only job as it is a serious liability for a commercial pool to drop below safe levels, so whatever amount of chlorine you were adding, wasn't adequate for sanitizing and now you realize that with algae growth. I believe your main concern at this point, isn't the algae in the pool, but the safety of your bathers. Post your FC, CC, and CYA levels, and the pros will be by to guide you through the process.
    Nod
    16x32 IG, polymer panel Vinyl Pool w/approx 21k gallons of H20
    1 HP Hayward Pump & 300lb Sand Filter ~ Polaris 280 Pool cleaner
    ~~Nashville, NC~~

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