personally though, i would switch the discus and the aro/flagtail .... and change that interesting gravel to more natural(blk sand looks nice ) as well as change the background of that 180 to black to bring out the aro's color ....
a datnoid would be nice too the asian combo in ur 180 : tiger(dat), dragon(aro), phoenix(flagtail/fei feng)
hehe, dunno , just my personal advice: )
it looks great rite now, but i just think it could be greater keep up the good work!