1. Apple Cider Vinegar for clarifying. (Some folks use a can of beer at every wash to keep build-up at bay...i.e. 1st wash, rinse with beer, second wash).
2. A good quality shampoo. A lot of folks with locs swear by Bronners Peppermint Castile Soap so that's a thought. I suggest JASON shampoos or Aubrey Organics. Aveda Sap Moss is good too.
3. A light oil to massage into scalp and locks. (Olive oil or coconut oilwith a little citrus essential oil (lime, lemon, lemongrass, grapefruit, etc. or a combo. Maybe a few drops of rosemary oil.) There are some good blends as well.
4. If you're palmrolling or fingertwisting, Aloe vera gel mixed with a teeny bit of oil in #3 and a few scant drops of honey.
5. Clips if palmrolling or fingertwisting. I strongly suggest the single pronged ones.
That's about it.
BTW, I don't have locs (almost did..changed my mind for the 100th time) BUT I did groom locs the last couple of years that I lived in L.A. All my clients were satisfied with their locs, their scalp, and this is the process I used etc.
p1