One pump is all you need to keep your balloons flying 10 times longer than conventional helium filled balloons. Place the nozzle of the pump inside the balloon as deeply as possible and pump down only once. Use the dispenser pump to inject a small amount of Super Hi-Float into each balloon. The chemical seals the inside wall of the balloon which helps prevent helium from escaping. A great addition to your balloon accessories. (Super Hi-Float sold separately as 1300216).