I can get minnows easily, but will they be any lower a parasite load than guppies?
i have a local bait shop that gets their minnows right out if the lake out back- but that's lake St. claire, and it's not particularly pure.

Ive mixed live minnows with fish slivers, pinky parts and worm pieces, and this guy seems to go for only the moving bits and those only till he's just full- he spooks easily and doesn't seem interested in gorging.

I'm out of worms- I may get some minnows when I go to the bait store and take my chances.