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 severums. So my main question is how long can i starve them? 2 days 3 day 4 days let me know. And plz dont comment if you think its cruel to starve a fish to get to change there diet