Hey, thanks so much for the advice. I definitely thought the tank was big enough so good to know it's not going to be good long term. I'll suss out some better homes for them and look into the species you've suggested.Unfortunately that's too small for Mbuna on the long run. Not only especially for big ones like the acai but also for the Labidochromis.
I would give the Mbuna away and go for lake Tanganyika cichlids. The tank size is nice for a biotope tank with two species like for example a pair of smaller Julidochromis and some shell dwellers.