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Food grade H2O2 Calculator for Water Sanitation (Developed by: John Richter "DIY cold plunge")
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Adding food grade H2O2 to the water is optional but it is the most "enviromental friendly" way and 100% skin-afe to enhance water sanitaion.
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Instructions
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Please got to --> "File" --> "make a copy" and add your values in the yellow cells
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1. Select your box size from the drop down.
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2. Enter your volume concentration of hydrogen peroxide.
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4. ONLY enter data into fields highlighted in yellow!
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5. Read the below notes for more information.
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How Much Water is In My Chest Freezer?
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Most chest freezers are not filled to capacity with water.
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The volumes listed on this chart use approximately 70% of total capacity.
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Chest Freezer Size
Approx. Water Volume
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Cu Ft.LitersGallonsLiters
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14.841970265
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21.7614108408
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25708179678
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Select your box
Box 14Gallons70
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Liters265
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Concentration of H2O2
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Enter your concentration here (ex: 12%, 35%))
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Concentration: 12.00%
<---- [ Enter your data here]
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Amount of 0.12 Concentration H2O2 Needed For:
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Shocking
Maintenance
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6.5 oz.3.3 oz.
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193 ml 97 ml
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Formulas for Volume of 35% H2O2 Needed
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Here are the baseline formulas recoimmended for hot tubs.
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To shock your water:
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Per This Amount of Water
Use this much H2o2
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250gallons8oz.
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1000liters250ml
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For maintenance:
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Per This Amount of Water
Use this much H2o2
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500gallons8oz
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 1,893 liters237ml
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Notes
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1. After shocking the water, always wait 24 hours before getting in.
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2. Always use H2O2 test strips to ensure the proper amount of H2O2.
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3. Hydrogen peroxide levels should run between 30 and 100 ppm.
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If the levels are below 30 ppm when testing, add hydrogen peroxide at a rate
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of 1 cup 35 percent food grade hydrogen peroxide per 500 gallons of water.
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Circulate and let stand several hours before testing after adding hydrogen peroxide.
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You can get test strips here (Amazon affiliate link):
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https://amzn.to/3xEWBvW
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4. H2O2 should not be used by itself to sanitize.
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A secondary sanitizer is recommended. An ozone generator is a great option.
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The JED 203 has a long-term track record of success and is highly recommended.
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You can find more information about the JED 203 at
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http://www.chestfreezercoldplunge.com
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UV light can also be used, but can be problematic to find one that actually sanitizes and
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the setup can be tricky. Check out the FAQ on my website for more info.
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5. Keeping your water clean requires three things:
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 a. Circulation
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 b. Filtration
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 c. Sanitation
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This spreadsheet is provided "as-is" with no expressed warranty as to its accuracy.
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Many variables can affect the quality of your water.
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Your patronage through using my affiliate links and purchasing products from
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my website helps me support our global cold plunge community - and my family-
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and is greatly appreciated.
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https://ChestFreezerColdPlunge.com
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Version 4.0
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Last Updated: February 14, 2023
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© 2017, 2023 by John Richter and Chest Freezer Cold Plunge
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Do not erase these fields!
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Calculation for percentages:
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