I don't know what kind of tank you're going to get so both of my figures are not including fish and corals. The 20 gallon reef was about $32 per gallon while the 125 fish only was about $15 per gallon. That includes all live rock, live sand, equipment, etc, just no live critters. My 20 gallon gould have been less, but as it was my first attemp at a tank, I ended overpaying for a lot of stuff, and redoing things a few times.