Unless you are gone for 10 days or more, you don't need to set up a feeding substitute. When we moved here, we got rid of all but one tank and I fed them once every 2-3 days...didn't lose one for over a year. Took 3 years for them all to go. Oh, and they will die. If you are prone to crying, don't bother. If you want a 10 year pet, get a dog.