I have no problems with fluoro breaking. I have caught some monster bull reds on 20lb fluoro leaders and nothing that swims in the fresh water lakes I fish has that kind of power including stripers. I tie crappie leaders on 8lb Berkley flouro doubles on 6lb main line. You can use a little heavier leader because flouro sinks and is invisible. I may break off a bunch the next trip I take but to this date I have never had a crappie break a fluro leader