A couple things. I tried before using 1. It's a nightmare to cast, at least for myself. Also in a current it gets a lot of drag.
Some folks use a weighted tip leader such as T-11 or T-13. Again I didn't have much success with them as they are more suited for swinging the fly, which does work well in fall and spring but not so much a dead drift during winter.
I'm sure there will be a better answer then mine but this is my observation from my experience