Originally Posted by nietzsche
My mom has been wanting a seahorse tank forever, but I don't have the time to actually grow the food for them and I'm thinking she wouldn't either. What's the minimum sized tank for a seahorse? My LFS had said you could put them in nano tanks, but I wanted to find out more specifically what the minimum size would be
Yoy would need to choose your seahorse species first. Research feeding needs to be sure the species fits your lifestyle.
Smaller horses, Zulus, dwarfs, pygmies (NOT good starter experiences) require live food which can be a full time, messy job. They can live in a ten gallon tank. The additional note is that keeping the water quality is on the nano-tank level and also not for the inexperienced keeper.
Medium horses, kuda, reidi, erectus can reach lengths of 8 inches, or so. They should not be kept in less that a 30 gallon tank. At maximum I would say only two seahorses in that size tank, with seahorses that can (and SHOULD!) reach that size.