I have 1 black ghost knife, 5 tiger barbs,1 african ropefish, 8 serpae tetras,2 angelfish, 1 rainbow shark, 3 kuhli loaches, and 1 elephant nose. what should i feed them? i have been putting 2 raw shrimps in there, chopped up of course. and pellets, 1 cube of frozen bloodworms, and tetramin flakes. what should i be feeding them and how often? i have only had them all for a week.