Glass, Acrylic, Lucite, I guess anything if it was sealed, like if it were to be dipped in something that would make it non-porous.
Oh yeah....PLASTIC! and the old favorite PVC!
is this for your "dare to be different" Techno-Tank? You know what might be cool is some LED's as long as you can ensure no one get electrocuted. GFCI all the way for sure.
Like the Borg from Star Trek inside the tank?
Assimilate....
