What do you use?

I am looking for something to use in a long storage minnow tank..to save them from trip to trip

I'm looking for a link about long term storage. The only thing I've found yet is "Bait Buddy" good for about 24 hours.
Sure-Life bait problem solver!

With BETTER-BAIT™ in the water, there are much fewer losses and the baitfish are much livelier which helps increase the chances for a longer and more productive day of fishing.

I called the number on this link. BETTER-BAIT™ Minnow Holding Formula
I was told: Change 20 to 50% of water daily. Take water from the bottom of tank, that's were the bad chemicals are located, add more Better Bait.

Better find a way to cool your water when it gets warmer outside. Hard for me to keep minnows at the lake when I'm not there and it's hot outside.

I use an RV filter to fill my tank when I keep my minnows. I don't use to many chemicals.

I would definitely take Flangers advice in this matter. He has hauled billions of them critters.

Keeping them cool and change the water is the key. I use a RV filter for water change out too. The pipe is 6" down from the road to the house. On hot days the water is hot. I have a 10 ft coil of 1/2" tubing in a frig. The water is pumped out of the tank, into the frig and back to the tank. The best I can get is 10 degrees cooler than outside temp. It's got to be between 50 and 60. At 65 I was boiling minnows.

Run the coil in the freezer Cane. I HEARD that worked better. They make a water cooling system but I've never used one.

I use the blue stuff, but a guy told me to put peroxide in the bait tank and watch em get happy. When I run out of the blue stuff I may try this. After googling it, it makes sense.