My featherduster two weeks ago started to drop his feathers and then disappeared for two weeks. He just came out last night with very small feathers about a half an inch long. My question is what should I feed him now? I have been putting "MICRO VERT" by Kent in the tank, using about a cap or two every 3 to 4 days. I have a 110 gallon tank. Should I keep doing this or should I try to use a plastic syringe to get it closer to him? Thanks a lot.