Thanks W.G. for your help. I would not want the gobies to starve to death, so I will wait if I need to. I hope that whenever I add the gobies, I will be able to keep them supplied with food. I have a 220 gal. tank with about 200# LR. and another 100# (?) of the dead kind. (hope that makes sense). My tank is deeper than most as it was custom sized to build into a spot in my house that we just built. I was going to go free standing, and decided to build in after, so the wall was there already, and had to make the tank fit. So, he said that it was better to put the less expensive rock underneath the live, as it was going to get all covered up anyway with LR. Does that make sense? Tank size is 60# W x 36# H x 24# D. I think I have a sort of refugium. I have an ecosystem, with LS and calurpa growing. So, it acts as both the sump and refugium. I am going to check with my lfs guy, who got me set up how to use that as a food source. He did tell me to wait on the gobies, when I first got set up, but with the bug activity that is going on, he thinks I'll be OK. Again, he also knows better than I do for what I got in equipment, and he is coming in once a week to help educate me, and keep my tank in shape. So far, the tank is really doing great. I'm still a little confused on what all the different bugs are that are in my tank, so if anyone has any other great link son bug life, I'd love to see it. I couldn't say for sure if the bug population is enough, so more input would be greatly appreciated. I know that my lfs guy has been great, and I hope that he wouldn't want to just make a sale, knowing the gobies would die of starvation.