oh wow i love the hardscape!!!!!!
he idea for cardinals is great no matter what they say...their colors are going to just pop! if the tank is big enough a pair of discus or even maybe a pair of silver angels. the dwarf cichlid idea is cute i love them i would go with a pair or apistos like said or my favorite the german blue rams...otos are a good idea but i love the twig cats they are sweet and wiil be amazing in here...i love the frog bit idea it will help the tank get that water dance look...o wow i hope you do this i can only imagin...if you really want to make it look great get some of the fake plastic vines from drs foster and smith..here is the link
http://www.drsfostersmith.com/produc...4&pcatid=12124
put them more by the wood dropping into the wood
cory cats...i love the jullis and the sterbai tell me what you think