I have read that maggots are good for feeding the swim because they sink. Well, mine float. I tried them frozen and dead...the floated. I tried nice healty ones...they floated. I am thinking of making a few PVA bags with maggots and a few pebbles to take them to the bottom. Then if they float it won't matter much because they will be floating up from the bottom. But when I toss them out they just swim around on the top of the water and drift with the wind.