Originally Posted by lion_crazz
No, copper is very commonly and successfully used in many freshwater tanks. If we were talking about specific freshwater fish like discus, angels, tetras, rams, kribs, and apistos though, then you would be very right. Cichlids on the other hand can tolerate copper without a problem.
I've never gotten into chichlids, that's probably why I didn't know. It never interest me to keep'em. They're tough fish anyway, very aggressive!! A few of my friends keep'em, but not me! :happyfish