Yeah I saw that, I'd recommend melafix, salt, and 30% daily WCs. She should be alright after a week or so.
I don't think that is a solution though, did you plan on ordering a male isletas or a male grammode from gage?
Honestly I think you either need to decide on the grammodes or isletas, or set up a second tank so you can keep both pairs (Because you definitely want a pair of isletas if you already have a female IMHO).
I understand you want to see how they look when they get older (the hybrids), but perhaps you could move the growouts into a divided section of the 75 and put the isletas in the 20 to heal alone. This all depends on what you use as a divider because if you use light diffuser the hybrids will wiggle through
He is trying to sell all the other fish and he wants to keep the the red isletas and get a male for her. He has trade the LFS but he is waiting for them to clear up room so they can take the fish or he sales them
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Good to hear, wasn't trying to doubt his intentions. Keep us updated on the progress of the injury and recovery