Hi Merman,
I just wanted to add to what Pete had to say. I have kept many seahorses in a variety of tanks. Many of which were taller than wide and what I and many others have found over the years is that as much as vertical space is very important, horizontal space should not be over looked. As a matter of fact most of my early seahorse tanks were of the taller than wide variety and what I found is that when I moved the horses into the bigger longer tanks they were much more active. I am now of the opinion that vertical space and horizontal space are equally important. If you give it to them they will use it. I have found my seahorses to be much more active in my rectangular shaped tanks. In addition these tanks offer a greater surface area for gas exchange. If your plans are not set in stone I would suggest you consider a more typically shaped rectangular tank. Many of them are offered in taller than standard heights.
Cheers,
Leslie
Ocean Rider, Inc. is an Organic Hawaiian-Based Seahorse Aqua-Farm & Aquarium that Follows Strict Good Farming Practices in Raising Seahorses and Other Aquatic Life.
