AHA that's the problem. You don't have a blue acara, you have some species of Pseudotrohpeus. They are African cichlids from lake Malawi and they are very aggressive. Your post perplexed me at first because blue acaras are relatively peaceful and would get reamed by a texas in most cases. They also rarely get as large as you mentioned yours is.
I would get rid of one of the fish if one is already showing battle scars. The pseudotropheus is fully-grown but the texas has a ways to go. maybe he'll fare better when he's larger than the pseudo, but maybe not. Africans and new world cichlids fight a bit differently. Your texas is turning sideways to show its size, which can often sort out dominance (in new worlds) before fighting (lip-locking) occurs. Africans do more tail chasing and hit-and-run tactics, while new worlds are looking for a wrestling match.
I would get rid of one of the fish if one is already showing battle scars. The pseudotropheus is fully-grown but the texas has a ways to go. maybe he'll fare better when he's larger than the pseudo, but maybe not. Africans and new world cichlids fight a bit differently. Your texas is turning sideways to show its size, which can often sort out dominance (in new worlds) before fighting (lip-locking) occurs. Africans do more tail chasing and hit-and-run tactics, while new worlds are looking for a wrestling match.
he's killed so many fish that my fiancé dislikes him.
