So like my title says I have just inherited a syno. eupterus. I spent 2 hours on the net trying to identify him! The guy had no idea what it was.
So he/she came in a badly taken care of 20g that I bought from a friend of a friend. The tank was supposed to be empty, but he was still in there. The guy said I could take him or he was going to give it to a friend who had a 20g full of guppies. Well, I don't know a lot about catfish, but I do know a 6 inch fish doesn't belong in a 20g with 20 guppies.
So I rescued him/her. Of course now I have to live with my choice. So I have placed him in my 30g with my (mated)pair of AGGRESSIVE angels. He seems to be enjoying the clean water and space. The angels are nippy, but he seems to hold his own. He justs swims on by...

I realize after doing some research that this is not the best arrangement. So my question is:
Do you think this arrangement could work? I have lots of plants and driftwood in the tank. I have built him 2 caves on either side of the tank at the back. I do a 50% change every 6 days, and keep my nitrates at less then 10ppm. The lighting is very subdued, and I have been feeding him after lights out. My angels are very aggressive so I'm not worried about aggression from him. Thanks for any thoughts!
P.S. I am open to upgrading in the future, but I can't afford to just yet.