That should be fine. Most of the tank weight is already well supported. In your design, are the 2x4's run with wide side up, or on the there sides? If you run them on their side (the 3.5" side facing out front) then you will have no problems with a 7" ledge.
___My 120 Gallon___ EHEIM PIMP #407, 2x 2229, 2x 1250 Hobby Pumps, 1x Ecco 2236, and 1x Eheim Sludge Extractor
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.