Have had Oceanic 75 rectangular for 18 years - abused, dry stored in garage, and moved often with a dolly. Never leaked even though the tank was never level. Bought some used Oceanic 75 rectangulars about 9 years ago from someone who got them as handme downs. They could be older than the one I have. They looked abused when I bought them. Still no leaks. I like those odds better than what everyone is posting. Its a shame because I have always dreamed of having a bowfront. I went to a LFS and talked about an Oceanic 500 gallon. They recommended not buying Oceanic when purchasing the big tanks due to many customers having blowouts or leaks. This sounds like a manufacturing problem that they ignore.