Hey
@John08007 , thanks for stopping by my thread! It's been a lonely place lol.
I did something similar after the gut renovation job I just did the other weekend. I used a 3/4" bit and 1/2" PVC pipe. It's a bit harder than I expected and only got 3 rocks together that way, but it was worth it. Got a nice zero gravity look going on and a open center as a result.
It would have been easier to do when the rocks were dry, so I agree with you... if I was to start a new tank I would do it with more rocks. I was under the gun to do it rather quickly and get the rocks back in the tank.
The extra 6" in height on your tank must be pretty tough to work with, especially when you're fixing/cleaning anything on the sand bed, or at the bottom of the rocks. I barely reach mine and I'm 6' tall.