I've spent all morning looking at tanks online for Prince and Valentine. I think I'd rather seperate them, as Prince is my boyfriend's and Valentine is mine.. and having them together may cause un-needed stress.
I did some skimming around the other threads about tank-mates and noticed that these guys don't seem to get along with any other fish or marine animals. That's a shame, I was really hoping they'd at least be able to have something in there to help keep the tank clean. About 12 years ago or so I and my step-father had a freshwater aquarium full of all kinds of fish. Admittedly, he mostly took care of all the important stuff, but I don't recall we had to clean that tank very often, it pretty much took care of itself. It was possibly a 20 gallon or so? I don't plan to go that big with a tank for these guys, I like having Valentine on the shelving attached to my desk.. which is a base size of 12.5"x16" .. so I don't think I can do anything bigger than a 5 gallon. Is there much I can do so I don't have to be changing the water all the time?