what chemicals are you guys using to clean your PLATE exchangers? i normally use CLR and let it sit but looks like i forgot now i need to use something a little stronger to take care of this quick to get it back up and running.
Mine was completely clogged a few years ago. I filled mine with toilet bowl cleaner and let it sit a week. I flushed it out and filled it again for another week. It cleaned up nicely after that. I haven't had to clean it since, but I'd do it the same way if I had to.