Ok I need some advice. My fish have come down with ich and I'm going to put them in a seperate tank and treat them (while leaving the DT fallow for 8 weeks). Problem is my two stingrays. Some people say they do get ich and some say they don't. They show no signs of anything and are acting normal. The problem is I heard they don't do well with hypo and definitely no copper. If I leave them in the DT can they harbor ich while my fish are in treatment? Any suggestions what to do?