The RIO Predator 3D sinking lines will help you get the big flies out there and then down to them in this floating/hover/intermediate sink tip fly
RIO Elite Predator F/H/I Fly Line
Wild Water Fly Fishing 5/6F Switch Line, 300 Grains
Seeking Stillness and Sunlight: On the Art of Fly-Fishing ‹ Literary Hub
Fly Fishing Line Sink Tip Weight Forward Floating Fly Line 100FT 2 Welded Loops
Floating Fly Lines – Out Fly Fishing
Getting Started In Fly Fishing - Choosing A Fly Line — TCO Fly Shop
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Moonlit Fly Fishing WF All-Purpose Floating Fly Line
3 Options For Attaching A Leader To Your Fly Line - Fly Fishing, Gink and Gasoline, How to Fly Fish, Trout Fishing, Fly Tying