Last fall I caught 20 minnows out of the creek behind our house and put them in a 20 gal planted tank. The females are starting to have babies now, and I have a fry tank with 100+ baby minnows that are starting to grow up. Minnows are so robust and healthy compared to many of the tropicals. Maybe it's a local biotype tank. Is anyone else experimenting with local fauna? What kind of results are you getting?