Went to Tractor Supply today and purchased a 140 gallon tub. The dimensions are smaller but for $60 bucks you can't pass this up. also the 300 wouldn't fit into my truck :(. I will be buying the equipment for it as time goes on and will set this up as soon as I can. My 150 gallon is doing very well, good growth. As for sharks and rays I don't see this being viable for long. Will probably hatch a banded cat shark and keep it for a couple of years. Ray I may leave for now. This tub has an awesome footprint. I have a 75 gallon sump for it already and will be using my vertex omega 150 on this system and will be upgrading the 150 gallon system with a new reef octopus. Excited to get the ball rolling!