Originally Posted by KC Fish
I think a cichlid tank is definitely the way to go. You can have a huge degree of variety that way. And it's really not as hard as you'd think to have a bunch of different cichlids in the tank without having an aggressive atmosphere. There's infinite different species of non aggressive cichlids that would look much better than your normal tetras, mollies, etc. I have a variety of different cichlids in my tank, and I have no aggression or fighting at all. I've got a large Jack Dempsey(6"), a large green severum, 2 African cichlids, a parrotfish, 2 Peacock cichlids, 2 plecos, and a couple Cory cats(hilarious little guys). And it's a very peaceful tank. All the fish have beautiful fins and rarely even chase each other in the tank. Don't be scared off by cichlids...
I'm with Fish on this. If you started out wanting a salt tank, I don't see the jump to a planted tank with vanilla fish. You've got a ton of options for a 100G African cichlid setup.