I used one in the Maldives on some channel dives with extremely strong current. Didn't bother with all that inflating/deflating stuff. My advice is simply to maintain neutral buoyancy and only worry about adding/removing air if needed. From a practical perspective, you're going to be task-loaded enough trying to find a good spot and coordinate hooking/unhooking with your dive buddy.
That brings me to my practical points on using reef hooks ...
1. Biggest thing is to make sure if you're going to hook or unhook, you and your buddy are doing it pretty much simultaneously ... because if you hook and your buddy doesn't, wave bye-bye ... and once you unhook, you ain't coming back if your buddy doesn't do the same. The current WILL separate you pretty quick if you're not doing it at the same time.
2. Make sure you maintain a good grip on your camera, or the current gods WILL claim it as their own. At a minimum, use a leash ... two leashes are better.
3. Streamline your equipment as much as possible ... danglies are a recipe for a really bad time, both from the practical perspective of having them "flying around in the breeze" while you're clipped in and also in terms of being potential snag hazards ... which you REALLY don't want to do in a strong current.
4. Don't turn your head sideways to the current ... clearing a mask in strong current while hooked in isn't as easy as it looks.
There are probably a few more practical tips ... these are the ones I learned about ...
... Bob (Grateful Diver)
Threats and ultimatums are never the best answer. Public humiliation via Photoshop is always better - airsix
Come visit me at http://www.nwgratefuldiver.com/