I have had this powder brown tang forever it seems like. him and my other fish caught ich so we did the whole 8 weeks QT
and leaving the main empty so now he has been in the main tank for about 2-3 weeks and all of a sudden the first week he has breaks in his dorsal fin and some pieces missing in his pec. fins so that pretty much healed up and i woke up this morning and he has a very very tiny scratch on his side and a break in his tail fin. what is going on here? no one is picking on him. he has plenty of room to swim being in a 150gal tank and he is only 3-4 in long. did he just forget how to swim in a tank with live rock in it? none of my other fish have any problem at all no scratches no breaks in there fins. i feed him algae every other day and bloodworms, mysis, or brine the other days and everything is soaked in zoecon garlic and zoe so he should have all the nutrients he needs and he heals fine but what is happening to him?