I have been piecing together things for a frag tank for my HS Marine Bio classroom. I have a 60 gallon tank and 36 gallon sump, a bio block and some live rock that have been aging for three months. A couple of pumps, ample lighting, salts and test kits..... It seems that I do not need a skimmer, but have at least one at my disposal. It also seems that this can be much easier than I've been anticipating it to be. Can anyone point me to where to get advice from a practicing reefer? My school's in Manhattan, Midtown West, I live in Queens.