Great vid I love it!
A few questions: It looks like the base of the tank is set up with small walls sort of a grid sectioning the bottom of the tank, I don't know how many. All of these short walls seem to be at the same level as the glass. So if the glass was removed you can still fill up the first two, two and a half feet with water. Is that for maintainance, so you can drain half or 1/3 of the tank (depending how many sections/grids) and keep water and fish in the rest of the tank. For instance if the bottom needed resealing or something? Or is it just structural?
Also glass vs. acrylic? If you did it over again would you use acrylic?