Thank you for the advice and kind words. It’s been a very enjoyable tank. Plenty of activity while still remaining very manageable. And the convict has turned into an amazing little wet pet.Looks like injury to me as well, though you should monitor the fish in case the white stuff grows (indicative of fungal infections).
Anyways, I love your setup. Central American cichlids + swordtails is always a W setup for me because it replicates a natural environment and also looks aesthetically pleasing.