I recently increased my tank size from 130litres to 240 litres, and want some help converting it to a S.American Cleawater stream tank.

I really like the driftwood, but would like any suggestions to make it "flow" better!

Plants in tank:
Cabomba
Dwarf sword
Stargrass
Dwarf hairgrass (not sure of variety though, and its not filling out very well)

Fish (left over from prevous tank):
2 x long finned bristlenose
1 x albin bristlenose
3 x cardinal tetras
3 x rummynose tetras
15 x penguin tetras
3 x glass catfish
2 x polka dot loaches
2 x kuhli loaches
1 x Bolivian Ram
2 x otos

I think it will look great once the plants fill out a bit. Maybe add a bit more cabomba. I think it would look nice to plant some jungle val. on the left side of the tank. So are your plant selections all native to S. America? I did an Amazon biotope once, but ended up diversifying.