I'm currently building a 470 gallon plywood tank based off the dimensions of a piece of tempered glass i got for free. The glass is 98 x 37 x 1/2. The tank will be104 x 41 x 30. I would like some advice also. The glass bowing will not be an issue. Strength is my only concern. I've seen tempered glass break before, i just dont want to see it in my basement with almost 500 gallons behind it.