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Thread: Trichlor, Lithium Hypochlorite and Inline Chlorinator

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    cvgnus's Avatar
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    Trichlor, Lithium Hypochlorite and Inline Chlorinator

    Hello all,

    I will be transitioning to the TFP method of pool care but currently have some expensive pool supplies I would like to use up before I fully transition. I currently use granular trichlor through the skimmer strictly for cya addition when needed. I use lithium hypochlorite for daily chlorination also through the skimmer (never use trichlor and lithium on the same day). I also have about 24 lbs of trichlor pucks to use up (probably a few years worth of cya for me) so once my granular trichor is used up I would like to use the trichlor pucks through an inline chlorinator for cya addition. My question is this, when I use the trichlor pucks in the chlorinator and make sure to turn the valve off, can I still use the lithium through the skimmer without creating a hazard? Also if happen to leave the chloinator valve on will I create a hazard? I have a very over sized pump (70 GPM) and over sized filter (27 SQ FT) for my size pool, just wanted to tell you this in case it may have an impact on this.

    Thank you
    5900 gal Oval 17' x 12' x 54" Sharkline Navigator 54 AGP; 1.5 HP Hayward Power-Flo LX Pump; Hayward EC65A DE Filter; AquaComfort XL ACT-750 Heat Pump;
    Hasa 8 gal Liquidator;
    TF-100 Test Kit w/Speedstir

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    Re: Trichlor, Lithium Hypochlorite and Inline Chlorinator

    The lithium hypochlorite should dissolve readily so I'd add that over a return flow which will dilute it quickly. It would not be good if concentrated lithium hypochlorite met with the Trichlor in the feeder though shutting it off should minimize that risk. Just remember that for every 10 ppm Free Chlorine (FC) added by Trichlor, it also increases Cyanuric Acid (CYA) by 6 ppm so it can build up rather quickly.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    cvgnus's Avatar
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    Re: Trichlor, Lithium Hypochlorite and Inline Chlorinator

    Thanks chem geek. I will error on the side of safety and add the lithium hypochlorite over the return when the time comes.


    Thank you
    5900 gal Oval 17' x 12' x 54" Sharkline Navigator 54 AGP; 1.5 HP Hayward Power-Flo LX Pump; Hayward EC65A DE Filter; AquaComfort XL ACT-750 Heat Pump;
    Hasa 8 gal Liquidator;
    TF-100 Test Kit w/Speedstir

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    Mod Squad jblizzle's Avatar
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    Re: Trichlor, Lithium Hypochlorite and Inline Chlorinator

    Is there a reason you are using the most expensive form of chlorine for you pool?

    Nevermind ... just reread the first post
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Trichlor, Lithium Hypochlorite and Inline Chlorinator

    The nice thing about the powdered chlorine products is the shelf life (as long as they’re still sealed). I keep some around for times when I really don’t feel like going to the grocery store or someone’s child creates a substantial, unexpected chlorine demand.
    20,000 Gallon kidney sort of a sand filtered gunite in ground pool w/ hot tub.

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