I'm looking to purchase my first sinking line for lake fishing. I'm looking to fish with streamers, but mostly plan on using it for slow stripping in chironomids down deep (around 16'-20'). I'm a little lost as to which sink rate I should get for chironomid fishing. I'm looking at getting Rio's Fathom line (5 weight) which has sink rates of 3, 5, and 6 IPS. I was thinking at first about getting the 6 IPS, but I am worried that during a slow/very-slow strip in of the chironomid, the line would continue to sink towards the bottom. Is this nothing to worry about or should I go with a slower sink rate? What are the pros/cons of going with 3 IPS sink rate other than longer counting time for it to sink?