I use a 60qt cooler with wheels and an adjustable handle, an oxygen diffuser, and a bottle of oxygen with a regulator that measures in 1/64th. I have been keeping minnows for 3-4 days in a row without any abnormal losses. I've used a medium medical bottle of oxygen for at least 20 days, (not in a row tho) and with the regulator set at 1/32, I haven't even used a 1/2 bottle. You can add a little ice in the cooler to keep the water cool in the warmer months. I also don't use the blue stuff. I bought an RV water filter at Wally World, and screw it on my hose and fill up the cooler. It removes the chlorine and most other chemicals. Don't need any water conditioner with it. For keeping bait during a tournament, it's nice and convenient. Can do the same thing on a looooong weekend!!!! I use the cooler with the oxygen to take my catch to the weigh in so my fish are good and alive. I put a milk crate in the cooler so I can lift out my catch and put them in the tourney weigh in basket without having to handle the fish individually.