If no other fish will touch the leaf, the SD's won't know that it is food. It might as well be a plastic ornament to them.

My SD's won't touch any lettuce leaves, but they will eat shelled peas. They will also eat the frozen San Francisco Bay Emerald Entree. I defrost it in a container and put parts of the cube in. It literally explodes as the SD's and other fish start to eat it.

Contains water, brine shrimp, mysis, krill, plankton, spinach, romaine lettuce, red leaf lettuce, spirulina algae, menhaden oil...