Geebee, I have used Stren yellow and blue. Having two colors creates contrast to aid in detection, and in deeper water acts as a depth gauge. I recently got some Cortland indicator mono, which is a single piece dyed in contrasting colors. Both work well.
You can grease the sighter to make it float, but I usually go dry-dropper instead.
Fwiw, floating indicators serve two purposes: strike indication, and keeping your rig from dragging across currents. I don't think of it as suspending my rig at a determined depth, but to act as a hinge to negate cross current drag. There's more to it than just throwing on a ton of shot and using a floating indicator to hold it off the bottom. Too much weight and your offering will drift too slowly.
As others have said, if you adapt to the water conditions, you'll catch fish. Being stuck only fishing one way will limit where you can fish effectively. I highly recommend picking up the Dynamic Nymphing book.