You know Tim? Aquavista?
If there isn’t water in the system now is the time to change it. Even tho it might cost a little bit more money it will be worth it to move it. Instead of 20 years of bending down under the tank. Plus if you find it hard to do maintainanance on the tank you will be less likely to do it. And if you don’t enjoy doing it the tank will not look the best then u you have an ugly tank then you don’t enjoy the hobby as much as you should.
I only am speaking from experience the best thing I ever did was move my sump to a remote location
Whatever you choose tho the tank still looks amazing I don’t want you to think that I am questioning ur decisions just trying to help u not go thru the same crap I went thru as that’s a big tank.