Ok, first of all, this is all academic so don't kill me. I read the article because I was curious how they set up the experiment. Although this is in regards to the protozoan parasite A. Ocellatum, and not Ich, applicability still applies. So here are some details regarding the "10 feet" transmission. A few bullet points.
#1 - there was NO TRANSFER when a typical air pump and air stone was used. "Trials one to three, in which a diffuser (the air pump and air stone) was used as the aerosol source, showed no transfer of infection."
#2 - the aerosol source for the other trials was a GARDEN SPRAYER with a MISTING NOZZLE that was filled with 100,000 dinospores in 2L of water and ALL 2L of water was sprayed into the air in 2 min. Please reread what I just wrote...they purposely used 2L of contaminated water and sprayed all of it into the air. That's like you standing in front of a person that has Turberculosis and having them cough in you face and wonder why you got sick.
#3 - the above was done under "static" air, in other words no air movement. The subsequent trials (3 of them) had a fan blowing the mist from the garden sprayer. Can you guess what the conclusion was...exactly ALL 3 trials showed infection up to 2 meters and 1 tomont was recovered in the second trial 3 meters away. Hence the "10 feet" conclusion.
Now, where this article is applicable is in the fact that they were trying to understand how the infection can possibly get passed in outdoor conditions between ponds.
I am no myth buster, but I will have to say that I'm not buying the 10 feet thing and quite frankly its overboard.
Again this was just for fun...for those of you out there...better safe than sorry.