As I've mentioned before, my 11 year old and 8 year old niece wants a fish tank for Christmas, so I'm putting together one for them. However, their mother, my sister, is not home all of the time because they share the house alternatively with her ex-husband and their father. He is NOT a responsible person, so I believe the solution to this without having the fish starve is an automatic feeder. Does anyone have any recommendations for a good one that's relatively cheap? I'd prefer it have a large reservoir and if possible at all, can dispense two different types of food (flakes and sinking sticks).