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Thread: Guestimate on how much bleach/chlorine usage?

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    Guestimate on how much bleach/chlorine usage?

    I realize that there are several factors that play in here, but I'm wondering about how much bleach liquid chlorine I can expect to use over the course of the summer season? Let's assume my ph, alk, cy, etc are all acceptable levels, and I don't end up getting any algae outbreaks. I'm curious as to what you think a 22k gallon pool here in Oklahoma, would consume bleach/chlorine wise? Reason I'm asking is there is a sale at the local Atwoods on bleach (5.25%) .99 gallon, and chlorine (10%) 2.99 gallon. I wanted to stock up.
    1972 - 22,500 gallon, In-ground Kidney shape Gunite pool built by Fiesta pools (2015 remodel), Sta-Rite sand filter Model 9462404 side mount ( Triton II TR60 is newer Equivalent), 3.1 sq ft., Pentair 011018 IntelliFlo Variable Speed Pump, Leslies Coppertherm (Raypak) PL 260AEN 260,00 BTU Heater, Anchor Defender Mesh Safety Cover, Taylor K2006 test kit, Dolphin Z5 Robotic Cleaner

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    Skitch's Avatar
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    Re: Guestimate on how much bleach/chlorine usage?

    There's a Pool Math calculator on Trouble Free Pools that will tell you how much chlorine you need at this moment.

    I believe the consensus is somewhere around 2ppm every day. In your pool I'm guessing that would be about a gallon of your 5.25% bleach.
    18k gal AG Sand Filter K-2006

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    Mod Squad Bama Rambler's Avatar
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    Re: Guestimate on how much bleach/chlorine usage?

    Depending on how many days your summer is. Multiplying the number of days by the amount of bleach you use each day will give you a ball park number.
    However, I wouldn't stock up too much in advance as bleach loses potency over time. I keep a month's worth of 8.25% and it doesn't degrade much in a month.

    If you figure about 2 ppm FC loss per day, and your swim season is 150 days long, you'll use about 77 gallons of 8.25% bleach the entire season. That's about 81 bottles of 8.25%. Or about 122 bottles of 5.25%.
    Dave J. TFP Moderator
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    Re: Guestimate on how much bleach/chlorine usage?

    Thanks for the tips. I can see using much more than I figured. I bought 24 gallons of the 10% to start off. May go back and grab some of the 5.25%
    1972 - 22,500 gallon, In-ground Kidney shape Gunite pool built by Fiesta pools (2015 remodel), Sta-Rite sand filter Model 9462404 side mount ( Triton II TR60 is newer Equivalent), 3.1 sq ft., Pentair 011018 IntelliFlo Variable Speed Pump, Leslies Coppertherm (Raypak) PL 260AEN 260,00 BTU Heater, Anchor Defender Mesh Safety Cover, Taylor K2006 test kit, Dolphin Z5 Robotic Cleaner

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    Patrick_B's Avatar
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    Re: Guestimate on how much bleach/chlorine usage?

    Quote Originally Posted by h2oluver View Post
    Thanks for the tips. I can see using much more than I figured. I bought 24 gallons of the 10% to start off. May go back and grab some of the 5.25%
    I would not get more. You have plenty now, maybe too much. This was a new fill right?
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    Re: Guestimate on how much bleach/chlorine usage?

    Yes new fill. You think I have plenty? This my first time doing the TF method so I have no experience to base my usage off.
    1972 - 22,500 gallon, In-ground Kidney shape Gunite pool built by Fiesta pools (2015 remodel), Sta-Rite sand filter Model 9462404 side mount ( Triton II TR60 is newer Equivalent), 3.1 sq ft., Pentair 011018 IntelliFlo Variable Speed Pump, Leslies Coppertherm (Raypak) PL 260AEN 260,00 BTU Heater, Anchor Defender Mesh Safety Cover, Taylor K2006 test kit, Dolphin Z5 Robotic Cleaner

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    Patrick_B's Avatar
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    Re: Guestimate on how much bleach/chlorine usage?

    24 gallons 10% for a clean pool of that size will last a little while yes. Just estimating, you'll use 60-70 ounces daily depending on what you lose. Some will be a little weaker by the time you get to it though, so unless you want more than a month out supply, I would wait. I'm like Bama, I'd rather not have it around for more than about a month. 10% degrades faster than 8.25% by a little, so there isn't much point if you see what I mean.
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    Re: Guestimate on how much bleach/chlorine usage?

    Sounds good. I'll go with what I have for now.
    1972 - 22,500 gallon, In-ground Kidney shape Gunite pool built by Fiesta pools (2015 remodel), Sta-Rite sand filter Model 9462404 side mount ( Triton II TR60 is newer Equivalent), 3.1 sq ft., Pentair 011018 IntelliFlo Variable Speed Pump, Leslies Coppertherm (Raypak) PL 260AEN 260,00 BTU Heater, Anchor Defender Mesh Safety Cover, Taylor K2006 test kit, Dolphin Z5 Robotic Cleaner

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    Patrick_B's Avatar
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    Re: Guestimate on how much bleach/chlorine usage?

    I love your enthusiasm, 24 gallons is a serious start. Love it!
    TFP Moderator
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