Jarvis Walker Deluxe AeratorKeep your Livies Living for Longer The Jarvis Walker Aerator is purpose designed for keeping Live Bait alive and healthy. Live Bait is the single most effective way of catching Predatory Fish. The Critical factors in achieving this are water temperature and oxygeneration. Water that is too warm, will cause baits to become drowsy,sometimes it will even prove fatal. Lack of oxygen in the water has the same effect.