Here you can see I put masking tape outline of where the new 262 gallon will be. Look at the difference in size!
Current 90 gallon is 48x18x25
New 262 gallon is 72x28x30.
I chose the 28 inch depth because this is all I could squeeze into the area I have to work with. Granted I am paying for 30 inches, I figured the 4 inches was worth the cost over 24 inches so I was willing to pay for 2 inches I won't be getting if that makes sense.
Had to move an electrical box to get a few more inches out of the doorway. Plan is to build double bypass barn doors. Got the header raised up and took out some studs on the left side as well to open it up.