Hi, So I have a 2.5 week vacation planned and want to be prepared to leave my goldfish alone and find it living when i come home. I plan on buying a timer (home depot/target) for the light. but for food i'm worried. i was looking at this: i read that the blocks/gels are risky to use. although the gel seems maybe better...but it is only one fish. and the drum automatic feeders might dump too much food in at once. this seemed to have the ability to control how much for each day in separate compartments. i'd be tempted to fill every other one to make it feed less. thanks!