I've done that with minnows/shiners in the winter because the bait stores aren't always open then.I've had good luck using a 150 qt. igloo cooler in a shed with an aquarium bubbler & shiner finer powder added.The Igloo & bubbles keeps the ice from freezing unless it's very cold like below freezing day & night for days.Even then,only a skim ice will form and I remove that.I've not had any success in warm weather mid june-september for any length of time.