Cecil, I've considered the grim possibility that all of the work we've done to try to keep YOY (young of the year) fish out of our ponds could be contributing to certain type of parasitic infections. I do know that anchor worms, which can cause blindness if they attach near the eye, have a free swimming larval stage which MAY possibily need many YOY fish to keep it in check. I hope that's not a mitigating factor for you.
