Joe, we had 2 depth finders on yesterday while fishing. I really don't think it bothers them much, but I have wondered about that in the past. I use Power Pro (10 & 20lb) on my casting poles and really like it. I have found that if I spray it periodically with silicon, it really helps avoiding tangles. My biggest problem is remembering to manually closing the bail just before the jig hits the water. That is definitely the biggest help.