Well 10 years back a small caddis pupa (18 - 20) with a definite pink tinge in it was lethal on the Wye.

I'd been trying to show a friend how to fish up stream nymph. One evening on the Wye I gave him a a small pink caddis pupa and he caught his first fish up stream nymphing on his own. He was made up.

That's why it never crossed my mind you might be kidding.

Must say though that I've never noticed that pink does that well on any other water.

Cheers,
A.