Water in a small inflatable pool without filtration should normally be replaced frequently. A practical guideline for many filterless paddling pools is to drain and refill them daily or every one to two days, depending on use and visible water condition.

For a small inflatable pool, typically a few feet in diameter, you will only need a few chlorine tablets to keep the water clean and sanitized. The exact number of tablets will depend on the size of the pool and the manufacturer's recommendations.

Pool inflatables often deflate in the sun due to a combination of factors, including heat, air pressure, and material properties.