Awesome Work Rhodes!
Especially the teinted sidewalls make the underwater world look incredibly realistic. To be honest I was afraid you intended to leave the scenery at the bottom of the sea as it was in your earlier posts.
My suggestion for the surface would be that you add a bit of "sponge"-foam. This would greatly improve the overall impression and is easily done even with all the rest in place.
Check my LVT here:
http://community.webshots.com/user/stefanbernet
Cheers
Stefan