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Thread: Ready to Start BBB

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    Ready to Start BBB

    I've been a di-chlor/tri-chlor user for 4 years; ready to switch over to BBB. My CYA is 120; my FC is 0. Everything else normal. Soon I will empty 2/3 of the water to get the CYA down, but in the meantine, I want to get the FC up. Water is clear, but I'm seeing some traces of algae. The caculator tells me I need to add 2730 oz of 6% bleach to get my shock FC up to 46.7. I know that's a lot, and I trust the math, but just want to have someone else tell me it sounds right. Also, what's best way to add it? Near a skimmer, or near a feed line? How slow do I need to be putting that much in?
    Thanks much.
    White plaster, 29k gallons, Pentair Whisperflow 2 HP, Pentair FNS Plus 60 sq ft, AquaCal 120 HeatPump

  2. Back To Top    #2
    DCAG's Avatar
    Join Date
    Jul 2009
    Merrimack, NH

    Re: Ready to Start BBB

    When you say you'll be emptying water soon... how soon it that? It seems like a waste of Chlorine if you're only going to be dumping it out soon.

    As for putting the bleach in... I normally just pour it near the return.

    And I see you got some good advise in another post...

    16' X 24' Wilkes Pools "Genesis", 10K Gal
    Hayward Powerflo Matrix 1 hp, & 18" Pro Series sand (S180T)

  3. Back To Top    #3

    Re: Ready to Start BBB

    Thanks, Dan. It might be a couple weeks before I dump it, and have some weekend company coming over.
    White plaster, 29k gallons, Pentair Whisperflow 2 HP, Pentair FNS Plus 60 sq ft, AquaCal 120 HeatPump

  4. Back To Top    #4
    svenpup's Avatar
    Join Date
    Nov 2009
    Sacramento, CA

    Re: Ready to Start BBB

    This is the reason you are going to drain, and why you want to drain/refill before you shock. You will spend a fortune trying to shock with your CYA so high.

    I am not sure where you got the "46.7" number for FC. Did you extrapolate from the Chlorine/CYA chart?

    2730oz of 6% bleach is in the ballpark. I get 2809oz, but I am not sure where the discrepancy comes from.

    Again, it will be very difficult to shock with your CYA where it is.
    TFP Method Advanced Intermediate
    • 17,500 gallons - In Ground - Plaster - Hayward Swimclear 3020 Cartridge Filter - Sta-Rite Max-E-Glas Main Pump upgraded with A.O. Smith B2980 E-Plus New Centurion Two-Speed Motor - Polaris 280 Cleaner with Polaris PB4-60 Booster Pump - TightWatt2 Timer - Taylor K-2006 Test Kit - Pool Pilot Digital Nano SWCG

    Helpful Links: Pool School, BBB for Beginners, How to Shock ('s a process not a product), Chlorine/CYA Chart, Jason's Pool Calculator

  5. Back To Top    #5

    Re: Ready to Start BBB

    I understand that you want the pool safe to swim in for guests so you want to shock now. But since you are not going to try to keep it as shock level after the guests go, why not just get it into safe swim range and keep it there until the dump and fill? That would be FC 10 to FC 14. Keep the filter running and test often to keep the FC up near 14. You won't kill off the algae but you can probably keep it from going into a full bloom while guests are there.

    Otherwise you are looking at STARTING with 15 bottles of bleach, but you may be adding several bottles every hour after that, for several days in a row. We could be talking 30 or 50 or 80 big jugs of bleach at $2.50 or more each.
    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.

  6. Back To Top    #6

    Re: Ready to Start BBB

    Great advice. Thank you all.
    White plaster, 29k gallons, Pentair Whisperflow 2 HP, Pentair FNS Plus 60 sq ft, AquaCal 120 HeatPump

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