This Saturday will be 8 weeks that the black axil chromis have been in the QT. They are eating well but still a little thin. No signs of any external parasites or worms. However, they now are showing signs of roughed scales and missing scales from roughing each other. I have 6 in a 20 gallon and they are not playing well with one another. Do you guys think it's safe to move them to the 90 now even though they have missing patches of scales. I only imagine that as the days go on it will get worse as they are starting to establish the pecking order and there isn't much room for them to hide and get out of each other's way.