Do you fast your aquarium fish?

The chance would be a fine thing with our fish! Every time my husband goes near the tank, they all come over to him, expecting to be fed. Of course, they don't get fed, but it doesn't stop them hoping. When we go away, my neighbour comes in to feed the fish, and I tell her to skip feeding them once if we're away for two weeks, and twice if we're away for a month. It gives her a break, and it keeps down the snail population when my husband's not there to hook them out on a daily basis.