I recently paired up some juvenile dark knight rams and the female seem to have had her dorsal ray nipped. At first i thought it would just heal with just water changes. However, it seems to now have advance and looks like fungus is on there. I’ve been treating it with erythromycin. It’s a breeding setup, no tank mates besides her pair, he is healthy. She has no progressed to just sitting at the bottom breathing faster. Any advice or insights? Pictures below.