[Pavel Chaloupka]

to this I would just say that if its not very often, not feeding the fish for one week at all is not a problem as long as they are adult and in good condition. This is true for most of the species. So if you do not have anyone to care about the fish well and you would have to make someone who could overfeed or do something else badly, then just not feeding for such periods is better. If you have fry, it is different and taking the risk is inevitable. With small fry, not feeding for days is quite a problem.