I had a similar situ here when I needed to move my old tank to the other side of the room as my new 7ft unexpectedly turned up a bit earlier than anticipated, operation move Aquareef 400 was a complete success, risky but a success lol
These are a set of industrial hydraulic movers, I have used before on safes, I thought why not a full tank lol, each one sits either side, with a 50cm toe plate slid underneath, ratchet strapped together with some padding around the glass, you then pump each side and it raises the toe plate 10mm, so it's a pump one side, then the other, then back and so on until you have enough clearance for the castors to glide you and your tank across the floor. I agree that it's a brave man who jacks up a tank, but then again nothing ventured, nothing gained lol
AWESOME!! LOOKS MUCH LESS COMPLICATED