Using more than one live well? Pro series three is the same as pro series two again a 11 position brass and nickel regulator, but this time with (3) large diffusers, and (3) 7 ft hoses and 3 way splitter. Add one of our aluminum powder coated tanks and you have the ultimate oxygen infusion system we sell. Your bait and fish will stay lively and active. Tournament fishermen know this could make the difference between a win and a loss.