Jugalone Toxin from Black Walnuts is what kills fish when Walnuts are put in a pond, not the tannic acid.

Here's a link where they talk about that. http://www.rogueturtle.com/articles/blackwalnut.php


www.hoosierpondpros.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).