Okay, makes sense, but do you have any links? I tried a while back but didn't have much time to spare then to do a good search. I thought if you had something, it would make it quicker is all.Yes,my understanding is because Coccidiosis is parasitic(produces eggs and cysts)which are extremely difficult to kill. Bleach will not kill cocci,a 10% ammonia solution is what is recommended to kill/disinfect. Bleach will kill bacteria/viruses.