You are probably right about the cuttle. I was just going by what the dealer was telling me (30g is fine for one). I still want to do the SW
tank. Although, I think I have to modify my design to incorperate a protein skimmer. I wanted to make it an "in-sump" skimmer. But, of course, I want to build it myself. I've looked at alot of DIY web sites and think I've come up with something. My question is, how tall does the skimmer have to be? It seems that the width of the tube is based on the gallons of the tank. But, one of the sites talked about the tube being 4' to 6' tall! This kind of defeats the purpose of hiding all of your equiptment under the tank. Based on the size of my stand, the tallest the tube can be is 20" (not including the collection cup). Based on the size of the tank, the tube will be 4" wide. So, will a 4" wide 20" tall skimmer work for a 30g tank?