I have been posting my woes regarding iron staining for a few months now (http://www.troublefreepool.com/yello...em-t43712.html). So far, TFP has been a huge resource. I have tried everything that was suggested on this site and more. After all this effort I am 99% positive of two things. #1 - I have a high level of dissolved (ferrous) iron in my pool. #2 - All efforts to sequester this iron for longer than 4 days has failed.
An interesting solution has been suggested to me by the pool company that originally installed the pool (and does repairs for us now and then). They have no "skin in the game" so to speak as they do not sell chemicals. They seem sincere and knowledgeable. Anyway, here was their solution.
1) Drop CYA to 40-50
2) Keep FC between 1.0 - 1.5
They state this is acceptable to sanitize the pool and will keep the FC low enough to prevent the iron from precipitating out. The FC numbers seem to come close to the Chlorine/CYA Chart by Chemgeek
What say you all??? I would like to have the thoughts of folks on this forum about this particular solution. Fire away.
Thanks in advance