What happens when swim with to much stabilizer the pool?

There are no known ill effects from too much stabilizer in the pool. Most health departments require draining if stabilizer is more than 100 ppm. But most agree that even up to 150 ppm causes no harm to humans. High levels do cause a slower chlorine reaction to contaminants. It was previously thought that high stabilizer levels resulted in chlorine lock, but that has been proven to be false.