On second though/glance.. if you have enough vhs lying around you could jack them to the floor and it may hold a 10 gal
! Talk about re-purposing old Disney movies
Assuming that's solid pine, the shelf is sitting on a ledger which is probably at least nailed into the frame, I'd put 100 lbs on there, if you are dead set on tanking that shelf? Add another piece of 3/4 plywood on top of the shelf and drill and throw some 1 3/8" screws in that ledger underneath..
A smaller tank though, 10 gal
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