Good catch. Too bad your minnows died. You mentioned that you had them in cold water. That could have been the problem. If your water was more that 3 or 4 degrees colder that the water in the bait shop they probably died from thermal shock. Most bait shops keep their bait at around the 60 degree level. You can keep minnows alive very well all the way to freezing, but you have to temper them a couple of degrees at a time. Also, it doesn't take much better bait in a cooler that size. 1 tablespoon treats 50 gallons.