Quote Originally Posted by Kouren View Post
The challenge with non-water and non-sky based tanks would be... actually being able to see the fish, I imagine. The opacity of other materials seems like it would be a design challenge to work around, outside 'because magic' type reasoning.
Lava would be easy, just red water and lighting instead of blue. Sand, I don't know since half the fish are sandstorm fliers and half are burrowers, it might have to be divided into sand and air which wouldn't fit so neatly into their current system (or just magically very transparent sand)