great thread rocketengineer. 
i'm currently starting to build a stand/canopy for a 50 breeder and want to use your stand design but have a couple questions.
1. following your design would substituting the 2x4's with 1x4's be strong enough? i will be using 1/2 oak ply to skin.
2. i want to have a flush fit between the stand and tank. would it be ok to size the stand so the edges of the tank are flush with the finished plywood and not the frame itself?

i'm currently starting to build a stand/canopy for a 50 breeder and want to use your stand design but have a couple questions.
1. following your design would substituting the 2x4's with 1x4's be strong enough? i will be using 1/2 oak ply to skin.
2. i want to have a flush fit between the stand and tank. would it be ok to size the stand so the edges of the tank are flush with the finished plywood and not the frame itself?