Hey- I did ask about high chlorine and looked at many websites. Above 30 was were it started to become dangerous as far as irrated eyes and respitory(sp) problems. At 50 there were more dangers. At 1000 you can die within 5 minutes. Kid swam at my house when it was 20. I told all of the parents of any unknown risks and let them decide. Most kids had goggles. The one's that didn't had hurting eyes- After a couple of hours and eyedrops, all was ok. There is soooo much different information out there. Today it was 16 and no one swam- I will not let anyone until we get down to 5 or so. I have turned off my swg and the cl only dropped 4 from yesterday. Also, most of the high cl problems dealt with indoor pools that aren't well ventilated. I remember as a kid on swimteams finding it hard to breathe in deep after swimming inside all day. It would almost feel like you had a sore throat, and it took your breath away.