A good professional pet sitter is a true find. Instead of relying on a friend to feed your fish, you can relax while you're away, knowing that your fish are in capable hands. A knowledgeable sitter should be able to spot medical problems and handle emergencies – and make your absence less stressful all the way around. If you are going to be gone for less than a week, you probably won't need the services of a pet sitter, since most fish can live without feeding for up to a week.
For more information, read Getting a Pet Sitter For Your Fish