I have never had an aquarium, but I want to buy the 29 gal oceanic bio cube. I only want to purchase additional equipment like a heater and a thermometer. Cured live rock (I guess about 30 lbs). What would be the best substrate for it and how much? Also do I add the substrate, the rock and then the water? And is this bio cube good enough to keep some coral in? Need all the information that I can get.