I think I have mentioned to you before that your pond is similar to mine in almost all aspects. I had very large crappie when we started but now very rarely see them. The only difference that I can tell between what you have and my pond is that we have hsb. It makes me wonder if they eat a lot of the crappie fry? We have caught only one crappie this year and it was very large about two pounds. Too big for a hsb to eat it. This is just a guess since I really don't know why we don't have more crappie.