Yestday I noticed his eye and i thought that maybe he got injured either by one of my fish like my sailfin tang, yellow tank of one of my large mushrooms. Today he is hanging out in the back of the tank and will not eat today. last night he ate and i had mixed focus and metronialoze. His bottom lip is also white. Should I give him kanamycin or tetracycline? Wet web media said that the popeye will be gone in a few days. What do you think?