I just got my first fish...2 Green Chromis. I fed them a little roger's reef food when i got home and they gobbled it up. I guess I am just wondering how often and how much should I feed them. Also, how long should I leave the filer and power head off? I tried to break the frozen food up but it seems to stay in big chunks which they pick at until it sinks (then my zombie comes out and eats it). Any help would be appreciated.