AnswerFirst of all, make sure everyone is out of the pool. Then, use a net to get the stool out of the pool and dispose of it properly. Then, you will want to check the chlorine levels and raise it to 2.0 parts per million if it was anything below that. The pH levels should be between 7.2 and 7.5. The pH levels combined with the chlorine levels will make sure your pool is decontaminated within 30 minutes.