What’s a better bait under ice for rats? Carrot or apple or both work?

I like a parsnip myself.That white shows up well.

I heard to try some orange flagging to catch their attention?

I have even caught mink in them under the ice using parsnip

Orange, yellow, or white electrical tape around the triggers. Save yourself the time and grief trying to mess with bait while out on the ice.

Parsnip for me

Parsnips are the way to go.

I peel a potato to use for baited 330's under ice for beaver, I've had plenty of rats trip the 330 trying for a chunk of potato