Both will work. I coat my wire bird feeder hangar with wheel bearing grease. If you use the oil in the bowls, rain, etc will get it onto the ground around the feeder.

It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP