Build a Tank question

[KrazyKuch]

well when you buy a tank yes the bottom is raised 1/4" but they also have the black bottom trim to help hold the bottom together, my question is, is how strong would that joint between the bottom and sides and front be if it wasn't reinforced by the trim piece....if you think about it on a 150 gal with water sand rock and what not pushing down on that bottom pain is the silcone joint strong enough without that trim piece to hold like 800lbs of presure??

or should I just build it with the bottom piece actually on the bottom, garf said I only need 3/8" glass on the bottom but I am gonna gop with either 1/2" or 5/8" glass on the bottom...I don't want to use tempered because I need to drill 3 holes in it!!