Compact Aeration for Live Bait CareThe Rapala Floating Aerator is a compact water-activated unit that gently mixes air into water for reliable bait care. It features an air release stone at the bottom and offers 18 hours of continuous run time or 36 hours on 15 minute intervals. Designed for most bait storage containers it operates on 3 C batteries and aerates 1.5 liters per minute. Water activated floating aerator Air release stone at bottom 18 hour continuous runtime 36 hour interval runtime Ideal for most bait containers