Clorox® Disinfecting Bleach — a 7.5% sodium hypochlorite solution containing approximately 7.1% available chlorine by weight — is a convenient, economical source of chlorine for water treatment in swimming and kiddie pools. Also, because this product is a liquid with no insoluble particles, it is especially suitable for this use. For the initial filling, use a bleach to water ratio of ⅛ cup bleach per 100 gallons of clean water (use the chart below for guidance).
Only a small amount of bleach is needed to treat the water in a kid’s pool. That’s why it’s important to measure both the pool diameter and the depth you will fill it to so you know how much bleach to use.
|Pool Diameter||6 in. water||1 ft. water||2 ft. water||3 ft. water|
|4 feet||1/16 cup||⅛ cup||¼ cup||⅜ cup|
|6 feet||⅛ cup||¼ cup||½ cup||¾ cup|
|8 feet||¼ cup||½ cup||1 cup||1½ cups|
|10 feet||⅜ cup||¾ cup||1½ cups||2¼ cups|
|15 feet||¾ cup||1⅝ cups||3¼ cups||5 cups|
3 teaspoons = 1 tablespoon = 1/16 cup; 2 tablespoons = 1/8 cup
Clorox® Disinfecting Bleach with CLOROMAX®
Pool chlorine test kit
Measure the pool diameter and water depth
Use the tape measure to determine how deep the water in the pool will be, and then find the inside diameter of the pool if you don’t know this already.
Mix the bleach with water
Add 2 gallons of water to the bucket, then use the measuring cup and/or measuring spoons to add the right amount of bleach listed in the chart to the water in the bucket.
Add the bleachy water to your pool
Pour the bleach and water solution in the bucket into the pool, scattering it over the pool bottom surface.
Finish filling your pool
Use the garden hose to add more water to the pool, mixing it uniformly with the bleach water already in the pool, until you reach the pre-measured depth of water you have planned for.
Confirm the bleach concentration
Use the chlorine test kit to check the chlorine level of the pool water to make sure it is between 1–3 ppm available chlorine before using the pool.Tip
Pool chlorine test kits are available at hardware and pool supply stores.
Maintain 0.5–1 ppm of available chlorine
Re-test the chlorine level in the water each day you use the pool, and when necessary add 1 teaspoon Clorox® Bleach per 100 gallons of water; retest to ensure the correct level of available chlorine is achieved.Tip
Empty small pools daily.
How frequently you need to re-treat the water depends on the outdoor temperature and the number of swimmers. Before draining the water in a treated wading pool, contact your sanitary sewer and storm drain authorities and follow their discharge instructions.
Do not enter the pool when the available chlorine level is 4 ppm or higher.
Frequently asked questions
- Can I use Clorox® Splash-Less® Bleach to disinfect my pool?
- How often should I put bleach in my pool?
It depends on how many people are using the pool, how hot outside it is, and if the pool is in the sun. These are all situations where the bleach will break down faster and why you may need to add more bleach. By testing the water with the pool chlorine test kit, you will know if the available chlorine in the pool is too low, and that’s when you would add more bleach. You want to maintain the pool chlorine level between 0.5–1 ppm available chlorine as measured by a test kit.
- How do I know how much bleach to add to a square pool?
A little math will get you to an equivalent diameter you can use. Divide the area of your pool (length x width) by 3.14 (the mathematical constant π). Take the square root of your answer, then multiply by 2, and this will give you an equivalent diameter. For a 7 foot pool:
(7 x 7)/3.14 = 15.6; square root of 15.6 = 3.95; 3.95 x 2 ≈ 8 feet in diameter.
- I want to fill my 6 foot pool so it’s 9 inches deep but that’s not on the chart?
To fill your 6 foot pool to a depth of 6 inches, you would add 1/8 cup (or 2 tablespoons) of bleach. You want to increase the amount of water by 50% with an extra 3 inches of water, so add 50% more bleach, which in this case is an additional 1 tablespoon of bleach.
Bleach should be stored away from direct sunlight in a cool, dry place. When stored as directed, a bottle of bleach has a one-year shelf-life. This applies to both unopened and opened bottles.