ripngrind once bubbled...
If you do need to adjust trim by inflating your BC, dont Alyways use you Direct feed. Do it Manually (Orally). Instead of just breathing out through you Reg and Wasting 1L of air conserve it by blowing it into the BC.
This is a convolution if you ask me. If everthing is working then the amount of air going into his BCD during a dive should amount to no more than a couple of breaths worth.
Spectre suggested that practicing is a good idea. I'll go along with that but don't confuse practicing with treating the symptom instead of the disease.
Here are a few more suggestinos:
- Check your weight. Take your time and get it right.
- Make sure you're balanced so you can swim and hover horizontally.
- relax relax relax
- and relax. When you exhale try to release tension in your shoulders and back.
- swim slowly.
- Use an efficient fin stroke (I like the frog kick for everyday diving but YYMV).
- use an efficient fin.
- dive a lot
- work on your buoyancy control. Hover a metre offf the bottom during safety stops. If this is easy then hover motionless.
- avoid sawtooth profiles, which in addition to increasing your DCS risk also causes you to use more air for trim.
- fitness is important.
- streamline your gear.
- using a bigger tank is a knife that cuts both ways. You'll have a bigger air supply but a bigger tank is also heavier and drags more. I think it's worth trying but not in exclusion of the other things.
- and finally, on the subject of breathing I think the only thing you need to know about breathing is "deep and slow". Nothing else seems to matter.
R..