The man created something really awesome in his garden. This feature let his koi fish feel better in the pond and at the same time it adds a wonderful feature to the garden that improves its look considerably. Koi fish owner made a tower tank for them. This incredible feature is a kind of bottomless aquarium. Some call it antigravity because of the physics of this thing. Water can’t spill down due to air pressure. Fish is free to swim anywhere it wants. It can enter the tower tank aquarium at any time and can leave it to swim in the pond. For some reason, fish prefers tower tank and stay there most of the time. It’s like an observation point for them. They are lucky to be able to climb so high and look at the world!