have used the flame/hi-vis colors in fireline and power pro for quite a while and i dont think it spooks the fish.
needed new line last fall on a couple of poles but both stops i made were out of flame green, so i went back to moss green. big mistake. after you are used to the bright color the moss is hard to see, especially, on cloudy days and when you are using flame or yellow line on other poles.
i gotta try the crystal – if i can find it. might have to order it.
btw, i do the rewind trick, too, from one reel to another, which doubles the use out of a spool.