Installed a Rule large capacity Oxygenator in Bay 190 livewell. It infuses the water with microbubbles and creates a directional circular current and has a valve which you can adjust and mount on the console. Haven't tested with bait yet. Use to use the large "Mr Bubbles" round oxygenator the ran on 2 "d" batteries which did well but wasn't water resistant and never lasted more than one season. Have used the tablets too. Also think the bait is suceptable to trauma bouncing around in the livewell if running in choppy water. Also, some suggest always having a light on in the livewell or add a window in the lid for light....next years' project. Let us know if you find the magic bullet.
