Clearly there is nothing wrong with cleaning gunk off of bio-media, I have just personally never needed a blast from a hose to do that. lol The entire concept has always been to keep the outer portion of the media relatively clear to allow more 02 into the colony to keep it healthy & thriving. Moist, dark, and aerobic. Bio-bacteria 101
Nitrifying bacteria around the world has made a nuisance of itself consuming chloramine. You're not going to kill something by exposing it to more of its food source.
That's funny, as I stated previously I have already seen it done. Do you think I make this stuff up just to prove you wrong? lol
Nitrifying bacteria in water distribution systems feed off of the ammonia, not chloramine. Running ones media under a tap doesn't feed anything, at that stage it is in straight disinfectant mode, designed to kill bacteria. This why folks like myself typically use water conditioners that split the chlorine/ammonia bond, allowing the nitrifying bacteria to safely remove the resulting now non-toxic free ammonia. Someone with a tank full of plants, and lower levels of chloramine might be fine with just sodium thiosulfate. I believe that is what Duane used for years on his 1ppm chloramine residual. He also had a lot of plants in his tanks. Not everyone does.
You talk about misinformation, but unlike you I am speaking from experience. I have seen bio-filters mostly wiped clean, and entire tanks of dead fish, because someone wasn't careful when dealing with chloramine disinfectant residuals. I have 20+ years of hands on experience in this area. I didn't just read something on the internet, and attach a link.
So feel free to post more academic papers, but please make sure that in the future they are directed at the specifics at hand, in this case nitrifying bacteria in a closed sytems such as the average aquarium. If you can find a paper or study that demonstrates that these bacteria can withstand being exposed to higher levels of chloramine for extended periods of time, I'm all ears.
Otherwise the only misinformation being spread here, is by you.