I recall the tidal garden guy having some youtube reference to a "guy in asia doing a floating aquascape"( don't remember which youtube of his but had some link ) but you can see this show tank he is working on in eps 1.
https://www.youtube.com/watch?v=C_3zTB6Fllg . His tank is similar to your except deeper. You can always ask him a question as he is quite receptive..he was on reefdudes not long ago.