I'm curious to know what fish people are working with. Are you trying to spawn the fish or did nature take its course? I am currently raising some turquoise rainbowfish. I have some really nice green guppies, red wag platies and red wag swordtails. I am also working with American Flagfish. My koi and goldfish are in the pond and nature seems to take its course with them as I have to thin the pond stock every year.