Trout rod, eh?

Well, if you're just using it for trout and panfish, I don't think you'll have to worry about breaking off, but if you're gonna use it for bass or something, then I think you'd wanna change it. Also, if you got 6-8lb test on your spool it may be better to change it than take a change. Frankly I don't see the need to change it unless you're gonna be fishing in an area where you stand a chance to hook into a fish larger than a pound. Sunlight really does weaken mono, but if you're using good quality line you can still land fish, trust me, i've done it.