Just put saran wrap over the sump and display and slide it over. HAHAHAHA! Just Kidding. Have fun with that sounds like it's not going to be enjoyable. You can do the math and figure out your rock weight, substrate, equipment and water per gallon at 8.4lbs. Maybe that can help with how many pounds you're trying to move. That's my best guess.I have a question. I need to slide my 350 about 1 foot to the right. It's on hard wood (laminate style, not real wood) and I don't mind scratching the floor. My plan is to drain 75-80% of the water, and just slide it over. Any thoughts on this?