I noticed this small spray bottle of Spectrum Response setting on the counter near the check out of a local fly shop last week. I grabbed a bottle (of course I did) and have yet to try it. I wonder if anyone else has tried it as yet? Not a scent additive but a visual enhancer…a means to maintain colors as the fly descends thru the water where colors fade off the spectrum chart. Interesting technology. This is a bit different isn’t it? An additive to the fur, feathers & synthetics on the hook.

spec resp