Originally Posted by revhtree
If you put that much food in, that is not being eaten, your ammonia levels are going to sky rocket.
I would actually disagree with that in part. Wether the fish eat the foods or it simpley falls, the resulting waste will be pretty much the same. The fish waste still contributes just as much to the bioload as if the foods where left in there uneaten. There is not much difference between the two in terms of causing ammonia.
If your bioload goes from a few fish to nothing, the bacteria will indeed die off from lack of nutrient. If there is not enough of an ammonia source the food chain on down the line will also suffer. Once the fallow period is over and the fish added back to the tank, the bioload will otherwise be stressed and ammonia will be a concern.
Personally I would opt for small daily feedings in an established tank but only about Â½ the normal amount. If a newer set up or just recently cycled then I would opt for only a few days a week.