On the other hand, too little cover will make it super easy for the predators to eat the YOY and recruitment will suffer. I saw that in my pond.

(either that, or not enough female BG)

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).