My tanks aren't huge but figured I'd put them anyway. I currently have a glasscages 240. I believe they said it weighed 627lbs. Tomorrow I'm getting a marineland deep dimension 300 (6x3 footprint). Marineland had listed this at a dry weight of 460lbs. I personally don't mind heavy tanks because my other hobby is powerlifting and I have a lot of strong friends. So I would prefer the cheaper glass.