If your kid's pool is pretty small, and draining and refilling it doesn't feel like a colossal waste of water, then the best way to keep the kiddie pool clean is to drain it when the water's dirty, scrub it down with a plain old kitchen brush and some mild dish soap, and refill it.
If you don't have a drain plug in your kiddie pool, but you have a nearby hillside, you could use a garden hose to siphon most of the water out, to a point where you can flip it over to empty fully. An easier method would be to use one of our small submersible pumps.
The answer will make your back hurt: Kiddie pools should be drained or emptied after every use, according to the Centers for Disease Control and Prevention (CDC).
Without Chemicals
If a parent chooses not to use chemicals in the kiddie pool, the water must be drained after the children are done using it. This should occur within 24 hours. That means the parents must go through the hassle of filling the pool with fresh water each day. This is not a good use of water.
Small inflatable or plastic kiddie pools and water slides don't have the same protection against germs that a swimming pool, hot tub, or water playground do. That's because it is unsafe to add germ-killing disinfectants, such as chlorine or bromine, to the water in kiddie pools and water slides.
Although inflatable pools don't need to use chlorine, it's one of the most common ways to keep pool water sanitary and safe to swim in. The chlorine is used to efficiently kill bacteria in the water that may be harmful to swimmers. Larger inflatable pools will benefit the most from the use of chlorine.
Clean and disinfect the kiddie pool after each use: Drain or empty the pool after each use. Leaving the pool full overnight is unsafe, both because it is a potential drowning risk and a potential waterborne disease risk.
How do I keep a kiddie pool clean without chemicals? If you simply do not want to use chemicals to keep your kiddie pool clean, there is an alternative. Rather than chlorine, use Distilled White Vinegar. Add 1/2 Cup for every 100 gallons of water in your pool.
I think the answer to your question is about 3-6 days. The problem is that the chlorine that you need to keep the bacteria in check is used up more quickly as the temperature rises, the activity increases, and as sweat and other body stuff is put into the pool.
Use a solution of warm water and white vinegar for a pool that is only slightly grimy. You only need about 1 part vinegar to 10 parts water. Dip your rag in the solution and wipe the pool clean. Toss the rag in the trash.
Salt is often presented as a healthier alternative to adding chlorine to a kiddie pool, since saltwater is gentler on the skin.
It is important to know what exactly bleach is before you put it in your pool. Household bleach, Clorox and liquid chlorine can all be used to sanitize a pool. They are all types of chlorine. Household bleaches such as Clorox usually contain about 5-6% available chlorine, about half that of pool liquid chlorine.
Baking Soda and Green, Blue, or Yellow Algae
You'll need to use an algaecide to kill the algae and superchlorinate your pool to clear the water. After this treatment, test your pH and alkalinity and add baking soda to raise alkalinity to at least 100 ppm and pH to between 7.2 and 7.8.
For the greatest protection against algae, bacteria, and cloudy water, Intex pools should maintain a chlorine level of 2.0-4.0 ppm at all times.
WADING POOL DISINFECTION
When chlorinating wading pools, use 1/8 cup per 100 gallons of new water. Mix required amount of Clorox® Regular Bleach2 with 2 gallons of water and scatter over surface of pool. Mix uniformly with pool water. Empty small pools daily.