I recently bought a plywood tank sold to me as a 450 gallon. Turned out its closer to 600g. It's dimensions are 8' by 4' by 2.5'. The glass was 5/8. I say was, because it blew out all over my yard. After a little research, the only solution I've found is to cut 6 inches off the top. (Then itll be around 475g) Anyone have any other solution? Hell if 5/8 can't hold it as is, what will? If I decide to take the 6 inches off, what would you recommend the glass thickness? Also is a 2 inch parameter around the glass enough?