Free: Contests & Raffles.
In clear water I do not use anything at all and long leaders. In dark water I'll use crayfish/anise w/medium leader and in real muddy water I use Desitin with short leader.
I find that certain rivers like certain colors. Not sure exactly why. For example on rivers I guided in Oregon The Siletz was a peach and light orange river. Pink did not do so well there. Drift Creek, which shared the same Siletz Bay, was a pink, pink and more pink stream. Same thing with the Trask and the Wilson up by Tillamook. One was Peach/orange the other pink/white.