starve

I have two bass that are around 7" now and all there eatting is blood worms still and here and there if I mix beef heart or fish eggs with the worms they will accidentally eat them. But I really would like to get them two eat krill so i can but them in my 240g with a 16" arowana. And two...

So my friend, who unfortunately does not have a MFK account is going on a one week vacation soon. He was wondering if the Arowana will be fine without eating for that period, as feeding will be the only problem as he has a backup generator just for the tank. Any ideas or suggestions? Thanks