Details of the "low tide method" of tank moving?

[Aquattro]

Originally Posted by zoomin

but was going from a memory of a thread I read, etc.

That would probably be my thread. I did this with a 75g tank, but no sand and only about an inch of water. 3 inches of sand and 5 more of water would be too much to manage safely. I would consider it with no water, just the sand, but that might still be too heavy.

Mine was a 48"x18", 75 pounds of rock, lots of coral and about 1 inch of water. I've done it twice without issue. A 90 is only taller, so a bit more glass but otherwise the same size.
Overall the entire move has to be considered for stairs, corners, etc. Mine were easy, so 2 - 4 people managed it fine. The tank has t ostay level the whole trip, and don't extend it much more than 30 minutes.
If you have time and lots of rubbermaid tubs, that way works too.