First, if you are getting a sea hare, you shouldn't plan on keeping it for a long time. Most people get these because they have a ton of algae that they want rapidly removed. Once the hare runs out of food, they can starve. Trade them to someone else who has an algae problem of get credit at your lfs. Think of the one thrid credit that you will get this way, If you pay $24 for the hare and it cleans up your algae, was it worth $16? Get it, use it, pass it on....