Not to take away from the seriousness of these issues, but it's not that easy to get. I once had a wisdom tooth that cracked in half (I'm a dentist scaredy cat) and mouth siphoned a hospital tank twice a day for four months. The fish just kept having issue after issue after issue until finally I had to put them down. I had a necropsy performed and they were absolutely LOADED with myco. I was afraid for a nice bit after that. But I tell ya, I drank more of that water than I'd care to remember. I still mouth siphon, but I use a tube that is super long so that there is no chance it will reach me with one suck.