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  1. Doc Harry

    Oily tanks

    Dawn dish soap is used for cleaning cylinders to oxygen-clean standards. For air (not Nitrox) you can use any dishwashing soap.
  2. Doc Harry

    Buying my first set of fins. Which one?

    I have been using the GoSport for travel because of their light weight. Great fin for travel and warm water single-tank diving. But these fins are a bit too floppy for back kicking, and they're weak in strong current.
  3. Doc Harry

    Question How does Cozumel compare to other dive destinations?

    I forgot to add the Maldives
  4. Doc Harry

    Question How does Cozumel compare to other dive destinations?

    We've been diving only a few places - - like the Galapagos, Great Barrier Reef, Indonesia, Palau, Thailand, Korea, Honduras, Cayman Is., Turks & Caicos, Bonaire, Bahamas, Belize, Florida, Great Lakes, and the Mediterranean. In a couple of weeks we're going back to Coz for the 20th time. It's a...
  5. Doc Harry

    What dive sites should I visit in Belize

    Blue Hole is over-rated. It's crowded with new divers, who kick up a lot sand in the shallows. Down in the blue hole it's like a snow storm as the sand filters down, can't see much.
  6. Doc Harry

    Palau, Milne Bay or Raja Ampat around Easter?

    I've been to the Maldives, Palau, and Indonesia in the past 18 months. Palau LOB over the New Year Indonesia (Banda Sea) LOB in October We were looking for schooling hammerheads during Indonesia cruise. We saw 2 sharks during the 11-day cruise. Two. Palau -A lot of time hooked on bare...
  7. Doc Harry

    Underwater Photography Gear (Beginner)

    Congrats! Did you pay the dive masters? Keep in mind that dive masters work for money, and they're inclined to tell their clients how great they are doing to keep their customers happy and motivated -- regardless of how well or poorly they are really doing. I'm not saying that this applies to...
  8. Doc Harry

    Underwater Photography Gear (Beginner)

    Since you're asking... New divers have relatively poor buoyancy control and poor situational awareness. They get a camera in their hands and then trash the reef, kicking and breaking coral, etc., And new divers have NO IDEA of the carnage and broken coral they leave behind them. A new diver...
  9. Doc Harry

    Question High Altitude Athletes.... Less efficient at depth?

    It's simple. Both O2 and CO2 drive breathing. But it's more complicated than simple gas tension. pH and pulmonary compliance can also drive breathing. It's not simple.
  10. Doc Harry

    User replaceable battery vs rechargeable?

    I had a Suunto Zoop with a user replaceable battery. I had my own compressor, maintained all my own tanks and regs, etc. So I'm pretty good with gear. But my Zoop flooded every time I personally replaced my battery. LOL I now have a Teric and am very happy that don't have flooding risk anymore.
  11. Doc Harry

    Question High Altitude Athletes.... Less efficient at depth?

    This is also false. You're reading into my words what you want to see.
  12. Doc Harry

    Question High Altitude Athletes.... Less efficient at depth?

    Are you claiming that I equated the two? If so, prove it.
  13. Doc Harry

    Question High Altitude Athletes.... Less efficient at depth?

    Yes, they blow off excess CO2 with a faster respiratory rate, and increase their O2 through purse-lip breathing, aka "auto-PEEP."
  14. Doc Harry

    Question High Altitude Athletes.... Less efficient at depth?

    I've performed emergency intubations of quite a large number of people - literally thousands - who were hyperventilating and plunging into respiratory failure due to hypoxemia (low O2) not hypercapnea (high CO2). Blood gasses showed a reduced pCO2 from hyperventilation, and a pO2 that has NEVER...
  15. Doc Harry

    Question High Altitude Athletes.... Less efficient at depth?

    Not my job. Adults are responsible for their own education.
  16. Doc Harry

    Question High Altitude Athletes.... Less efficient at depth?

    As others have said, there are many other factors that determine your air consumption. As an anecdote, one of my diving buddies is a Mt. Everest climbing guide. He is shorter than me and weighs less than me, but our air consumption is the same. Our wives consume 40% less air than we do, so we...
  17. Doc Harry

    Bonaire Dive Shop Rec's

    To be fair, this was our reality and we don't recommend Buddy. And we don't recommend Bonaire unless you're prepared to deal with crime.
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