In theory, this is a brilliant idea! Fish especially, however, need and flourish best in horizontal space and not vertical. Remember the tall tower aquariums of the 90's ... gone.
vertical fish - Aquarium Advice - Aquarium Forum Community
How to build a custom vertical aquarium stand designed for three 10 Gallon tanks. *Now with music. Two of these aquariums will be used for breeding guppies and the third will be a hospital tank for sick fish. I hope to get the 55Gal up and cycling soon.
Aquarium, Chattanooga TN - Fish swim upright vertical - YouTube
1. Selecting topical fish for vertical aquariums. Which are suggested for this type of aquarium? I am thinking of a small mix of top swimming, mid-level swimming and bottom feeders? Any specific suggestions on type and number of fish that fit this aquarium?
Fish Tanks & Aquariums | PetSmart