I've attempted to feed my fish veggies cause I heard they were good for them, but they completely ignore them. I've tried Romaine lettuce, broccoli, and spinach (all blanched or steamed). It kinda reminds me of trying to get kids to eat their veggies. They (the fish, not the kids) just look at me as if to say, "Ok buddy, that was funny, now where's the REAL food. We want MEAT!!"
My fish:
6 Mossy Green Tiger Barbs
2 Dwarf Gourami's
1 Golden Zebra Loach