The amount of air to add to your BC is just enough to make you neutrally buoyant. Trim is what happens when you are neutral and stop moving.I *think* I need to determine the right amount of air to add to my BC but I can't seem to find that ...
Help?
So what happens at depth when you are neutral and stop moving?
Next question is what kind of BCD and how much weight do you have? BCs with large lift capacity can make holding a desired trim difficult as the air moves around. The weight is because I'm trying to figure out whether to recommend a steel or aluminum backplate to replace your BCD