Power generation using the potential energy stored in our tanks?

[Delphinus]

Hahaha, I hear you.

Honestly, I love the idea of an off the grid reef tank. To me though, I think approach would be about using the most low-footprint devices for one, minimizing consumption, and then using power generated from some means outside of the electrical utility. So, solar panels on the roof, a windmill, and geothermal, and so on.