I was looking at tanks at my lfs recently, and after some thought, it's come down to the perfect 2-item checklist: 75 gallon tank Sump Now, the question is, what to put in the sump, where to drill the holes, etc: On this store's pre-drilled tanks, the holes are behind a black (plastic) sheild, which has vertical holes at the top and bottom. These don't look smaller than a baby octopus' eyes/beak, so I'm thinking I'd better get the tank custom drilled. Is that the way to go? With a powerhead coming out of the sump? Also, he said that a fine mesh over the intake/outflows would impede flow. What do most people do about this? Also, I was told not to use a wet/dry as the sump (he said I'd have nitrate problems), live rock would be enough bio-filtration. This doesn't seem right...I picture non-live sand, live rock, a wet/dry suited for (help!) gallons, and a protein skimmer. Who's right here? Also, I've never dealt with a marine tank before, so I figured I'd try to keep a few small fish alive for a few months before ordering a bimac. Make sense?