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Thread: Do I need to add algicide weekly?

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    Join Date
    Aug 2015
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    Lowell, MA
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    Do I need to add algicide weekly?

    If I keep all of my chlorine/CYA levels in check do you still need to add an algicide when first filling the pool and weekly like most of the labeling on the bottles say? I typically use the algicides that do not contain copper for my outdoor pool, but just wonder if they are actually needed if the other measures are kept in check. Thanks.
    Pool install 6/2015, 27,000 gal in-ground, vinyl, 16 mil clear solar cover
    Hayward Pro Series 300lb high-rate sand filter
    Hayward Tri-Star 2-speed Model# SP3215EE pump
    Hayward Goldline Aqua Plus Salt generator with Hayward T-cell-15 for up to 40,000 gal
    Aquacomfort electric heat pump model# ACT1100

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    Central NJ
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    Re: Do I need to add algicide weekly?

    The only time some people here use algaecide is when they close the pool. I don't even use it then, I just tend to close it late and open early. If you don't keep you FC in check and you start to get CC > .5, we (the collective) recommend that you SLAM your pool.
    23K gallon, IG, Vinyl, Hayward DE-3600 Filter, Raypak 406A Heater, Hayward 1.5HP SP2610X15 pump aka AO Smith UST1152, TF-100 Test Kit

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    Texas Splash's Avatar
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    Re: Do I need to add algicide weekly?

    I agree ... don't waste your money on algaecides. Properly and consistently maintaining your FC/CYA levels (along w/ other items) will keep your water clear and algae-free all on its own. Save your money for pool toys.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Divin Dave's Avatar
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    Re: Do I need to add algicide weekly?

    If you keep your FC/CyA relationship, then you do not need any algaecide. Chlorine kills algae and therefore IS algaecide.
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

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    Donldson's Avatar
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    Re: Do I need to add algicide weekly?

    Just to pile on, I have not put any algaecide in my pool in nearly 6 years.

    Of course the bottle says to use weekly. Just like the shampoo bottle tells me to wash my hair twice

    From my HTC One via Tapatalk
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
    Pool School - PoolMath - HIGHLY Recommended Test Kits

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    Mod Squad pooldv's Avatar
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    Re: Do I need to add algicide weekly?

    No.
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  7. Back To Top    #7

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    Re: Do I need to add algicide weekly?

    I haven't used any algaecide this summer, with the exception of the bottle of BackUp I threw in there right after my pool was opened, which turned my pool water into a St. Patrick's Day beer.

    That experience led me here to TFP, and I haven't needed anything other than liquid chlorine, muriatic acid, and a touch of baking soda.
    25,000 gallon freeform gunnite/plaster, built in the 1970s/80s; Sta-Rite 9463004 575-lb. sand filter; Sta-Rite DuraGlas/Max-E-Glas (P2RA5F-125L) single-speed 1.5 HP pump, manufactured 12/1993 (1M93M).
    Helpful links: TFTestKits; Pool School; ABCs of Pool Water Chemistry; Chlorine/CYA Chart; PoolMath; SLAM - Shock Level And Maintain

  8. Back To Top    #8

    Join Date
    Aug 2015
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    Lowell, MA
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    Re: Do I need to add algicide weekly?

    Great, thank you!
    Pool install 6/2015, 27,000 gal in-ground, vinyl, 16 mil clear solar cover
    Hayward Pro Series 300lb high-rate sand filter
    Hayward Tri-Star 2-speed Model# SP3215EE pump
    Hayward Goldline Aqua Plus Salt generator with Hayward T-cell-15 for up to 40,000 gal
    Aquacomfort electric heat pump model# ACT1100

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