I use a blue barrel to keep minnows. I just use an RV water filter on the end of a garden hose to fill the tank. Add a little bit of better bait to make sure the contaminants are removed from the water and to condition it. I also installed a drain of course and change out my water every 3 days. I do about a 75% - 85% water change. Bought a dual outlet air pump from Walmart that is good to aerate up to 60 gallons, bought two weighted air stones from Academy Sports. I only use about 40 gallons in the 55 gallon drum. Oh yeah and the barrel is setting on a furniture dolly so I can roll it around easily when it's full of water. I don't have any problems keeping minnows with this system. I will admit only been using it for about a month, but my minnows stay very healthy.

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