Perhaps this will land in the controversial topics part of the forum, but after studying the CYA / Chlorine chart, I have to ask a question. I hope I don't get branded a heretic!
I get the whole concept that the CYA binds up part of the chlorine and from the standpoint of preventing algae, the higher levels of chlorine are needed. What I'm struggling with is the following from the Iowa state code for public pools (and other states seem to have similar rules):
"Bathers shall not be permitted in swimming pools when the disinfectant chlorine residual is greater than 5.0 ppm."
http://www.legis.state.ia.us/Rules/Curr ... /64115.pdf
This makes me think that the State of Iowa at least thinks (not that state legislatures are ever wrong!) that something is bad about levels > 5.0PPM. I'd sure like to understand that in addition to killing algae that there are no potential dangerous side effects from higher levels of chlorine.
This seems rather scary..
http://www.gasdetection.com/TECH/cl2.html (a lot of it is about chlorine gas, but some references to skin irritation at levels above 5PPM)
Is the CYA enough to prevent side effects of the higher chlorine levels?
I've read several posts here about the relationship between chlorine / CYA and algae prevention... is there a post that addresses potential health issues?