i am a fly fisherman who is getting into bass. how do you set up a tube and what colors for a dirty lake (i am assuming blacks, browns, and blue/purple)

those are good colors to start with.

you can texas rig them weightless, or with a bullet weight. there are also tube heads, which is basically a jighead that slides in the tube and the eye pops out the top of the tube and the hook comes out the back where the skirt is.

thanx for the advice

there are also a bunch of videos on youtube explaing how to rig tubes (and several other baits).

if I'm in light cover I like to fish tubes weightless. Use an offset hook, poke it through the tip of the tube and have it exit on the side, with a gap the side of the offset. Then twist it and run it back up through tube and out the other side, and bury it back in the side of the tube. Dont bury the hook shank too deep because you want a bite to pop it out of the plastic.

You can simply add a bullet weight to the head (i like to use a bead between it in the jig sometimes) if you need to punch through cover.