When my kids were very young we had one of those small kiddie pools. In the hopes of keeping water clean longer I calculated how much Chlorox bleach to add to the water to get the PPM to the needed level, but didn't know to add cyanuric acid (called stabilizer at the pool stores). Every time I added chlorine it was gone by the end of the day. I repeated this day after day for a summer. I thought that must be what the pool owners did.

It was out of that frustration that I started reading more about pool water chemistry and then finally decided to get a "real" pool.