I've gotten into an argument on another forum, with regard the effectiveness of bottled bacteria. My personal opinion is that they don't work. and I will explain later. I do know of nitraspirla (think that's what its called) however as that has to be refrigerated and has an extremely limited shelf life I do believe it to actually be a live bacterial population, and therefore works.
however given how Nitrosomonas and Nitrobacter do not form endospheres, and that they require the presence of both oxygen and a food source to stay alive, I feel they cannot exist within the sealed environment that is a bottle, with extremely limited oxygen, and a highly limited food supply (if any) especially when stored at room temperature, and given a long shelf live.
I have had contact with a microbiologist, who agreed with me that these couldn't be kept alive in the conditions I described, and the only method that they could be utilised for storage would be freeze-drying.