The suggestion about putting a SCUBA tank in a float of some kind and getting a long hose might be a good option. I know a guy who water hunted that way and would just put his mask on, put the regulator in his mouth, and lay down on the bottom and fan the muck away until he found his target. It still would be a good idea to take a course and learn the physics of diving and why you should do certain things and not do others. Duh on me! I have been using a hookah so long I forgot if you are going to fill a SCUBA tank and the owner of the air supply/ dive shop doesn't know you personally, you'll have to show your certification card. Probably similar to renting an airplane to somebody without checking to see they really have a pilot's license. One of the plusses about hookah is you don't have to go get a tank filled, hydro'ed every five years, visual inspection yearly, and carry and wear the darn thing. After reading all these posts it seems as the easiest would be to get a hookah of some kind and get the training to use it safely. That's not necessarily the same as SCUBA certification. Look on the Airline Hookah website. They have an online home study course that would help prepare you for the knowledge part. Learn the skills from sombody who's doing it. Jim