John Bachman wrote:

How do you keep the fish from eating them?

Put muzzles on them. Just kidding. I don't raise Koi and my Golden
Shinner minnows don't bother most of my plants. The tadpoles like more
plants than the minnows.
--
Pardon my spam deterrent; send email to
18,000 gallon (17'x 47'x 2-4') lily pond garden in Zone 6
Cheers, Steve Henning in Reading, PA USA