Brian, You're welcome friend.
Jenna, Welcome that's quite an impressive list there.
Thinking of Scaping and playing with the current sand container, my 20 long tank.
Considering a dirted tank, with thin gravel/sand cap.
Each generation imagines itself to be more intelligent than the one that went before it, and wiser than the one that comes after it.
It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.