I have HA Bearfarm Fluo 9cm as a favorite in humus-colored rivers at high cold water early in the season or during floods in the summer. The fluorescent orange body has a high UV effect humus water. Fished best in the middle layer of the river to get close to the fish. Recommended hook size: #6-8 treble, #6 double, #4 single. Guideline HA is a salmon tube fly series designed and tested by renewed angler and fishing guide Hajas Andersson from Åre, Sweden. He works at famous Hembre Gård by river Stjördalsälven and his flies are produced and distributed exclusively by Guideline.