Sorry to bump an old thread but this is right on topic so i figured better then starting a new one...
I have a 10 gallon spare as well, planning another 46 bow front maybe. I currently have 2 Electric Yellows and 2 Cobalt Blue's in the tank, they are still young as they are small. I'm going to redo the landscaping in it a little as it has plants right now and only 2 rocks and turn it into a rock cave thing. Is 2/2 too many already or can I maybe get 1 or 2 more of each and they will be ok till they get bigger and I have to move them into another tank?