I use autofeeders on my FW and SW tanks, I have both nutrimatics and an ehiem, both very reliable. The Nutriamtic is about $15.00, feeds twice a day, and has no provision for keeping the food dry. The eheim is the 'cadillac' of feeders, costs about $40.00, and is programmable to feed up to 4 times per day, plus has a fan system to keep it from clogging... Nice stuff, but probably overkill for a 1 week vacation