I am in the beginning stages of researching my first marine/reef tank and I was pricing out some live rock when I came across a site selling two types of live rock: Live Rock From The Gulf Of Mexico. The first is what they call premium decorative live rock, comes covered in thick coralline algae on it and a mixed variety of plants, animals, hard and soft corals, and sponges. The next type is coralline live rock without the critters. Used for base foundation. My question is, starting with a brand new tank, is this deco rock a good idea? I'll be purchasing a 28g nano-cube so I figure I need about 40 lbs of rock. Does 20 lbs of the coralline and 20lbs of the deco sound like a good idea? Thanks for your time guys!