Ok you got one guy making it work but with some pretty good effort! Sounds to me bassman if you want to do Crappie you better be ready to have a good plan in place to manage them. Like Omaha said do you have access to your pond 24/7 to manage it? If so you might be able to make it work, but if what BZ said above sounds like to much work for you then you may want to reconsider.
