An army of dwarf monos!
Or perhaps go halfway and try mudskippers?
For a 125 I'd get a trio of monos, a pair of scats, a trio of columbian cat sharks, a jade goby, a trio of brackish eels, an archer and a pair of green chromides.
One day...
This is more like what I was lookin for....I dont like mudskippers, think they are lame...... i like the orange chromides alod, havnt seen green
chromides are great fish, they add a lot of personality that fish like archers and monos don't have, to a brackish community.