Hi. I'm new to this forum, but my husband and I desperately need help.
We have two full grown angel fish in a 38 gal aquarium (along with seven serpae tetras, two chinese algae eaters, and a white cloud minnow). We moved all of the fish from their original 20 gal and 5 gal into the 38 gal approx. three weeks ago. Before we moved them, the black marble angel (Acute) was a little aggressive, but we hoped that moving them to a larger tank would help. Unfortunately, the aggression has just gotten worse. He bullies the other angel fish (Obtuse), including chasing him into a corner and ramming into him. I haven't seen any wounds on Obtuse yet, but I'm afraid that it's only a matter of time.
We tried taking Acute out, rearranging the tank (including adding more plants for hiding places) and then putting him back in hoping that he would think that it was "new" tank, but within five minutes he was beating up on Obtuse again.
At this point, we're not sure what else to do. I've read that getting another angelfish might help, but all of the angelfish I've found around this area are too tiny and would become fish food. I also worry that it would just add to the problem.
Any suggestions would be greatly appreciated!