Just as one can not perfectly reproduce an ecological habitat into a viv, not all the principles of aquaponics are going to translate into the a viv. Aquaponics involves big systems, the viv is a tiny system. You have a lot of space to work and tweak the system with aquaponics, and lots of room for error too.

Not so with the compairatively tiny viv.

Keep it simple, and keep to tried-and-true guidelines. You can go out on to more elaborate set-ups after you have some experience with the first one.

(I really think that water feature is going to be a major PITA to maintain, and won't be of any benefit to your pet.)