You don't even need to go to Reefcentral. Go to Google, and type in "30 * 12 * 24 cubic inches in US Gallons."
This would be a nice sized tank for a smaller species, but I wouldn't put a bimac in it. This tank has the same footprint (will fit on the same stand) as a 30 long or a 45 (I own all three!)
Dan