==Aquamax Snorkel== 
 Aquamax sells a snorkel that creates an air pocket with enclosed curves at the top of the tube. I used one for years, and I would never use anything else.  It really does let the air in and keeps the water out.  They are easily found and are worth the money, around $35.00.  Even Wal-Mart sells them on the internet. Bennett Turk