I've got a newbie question. I have 3 green chromis, 2 false percula clown fish, and a mandarin goby. My question is what is the best thing to be feeding? At one point when I bought the chromis they sold me some frozen hikari spirulina brine shrimp. Ive just been cutting off a piece and thawing it in some aquarium water then dumping it in. Is there a better food to use, pellets or flakes? Any suggestions would be great, thanks.