I think back in the day Hagen used to have a suspended bottom with a plastic skirt that went around the bottom of the tank.. the lfs store in Winnipeg I used to deal with years ago would sell these tanks to customers and what they would do would trim the silicone inside the tank on the bottom and reseal it where they cut it and then they would put a nice bead underneath the suspended bottom because they were always fearful that the bottom would bust out. And out of the 10 years of going to that same lsf they never had a single problem with customers coming back saying their tank is leaking underneath. I know it's a little bit off topic but in a previous thread that I replied to about the Red Sea Aquarium issues that people are having, I commented by saying that if it was my tank and if customer service were complete boneheads and not replacing my tank I would cut all the silicone joints out of that entire tank and redo it myself and it would look 100 times better than what the factory is doing right now.