No worries Tom, we will just have to agree to disagree on this one. It's not that your info is wrong, it isn't, it's just that IMHO I don't think at this point it's called for. My first action with anything such as what the OP is experiencing is clean water, and salt. I don't like using meds, and only do so if/when there is no other option. From what I can gather from what the OP has posted thus far, this may not even be a bacterial infection, at least not yet, but more of an injury. (from the fry picking at the slime coat) I would assume that the main reason this fish is sucking wind at the moment is from his rocketing across the tank top, off the wall, and across the floor - not from a scaleless patch that is flesh colored about 2" square. I just felt that it was a little premature to be treating this fish with a dose of *super* antibiotics before we knew for certain that we were looking at a bacterial infection that was raging out of control. It didn't sound like it to me initially, and still doesn't.
I also never said that Kanamycin is the absolute best choice for all bacterial infections, but it's a very good choice in the OP's situation (high pH values) and it's what he had on hand.
Spencer, I would pick some triple sulfa up when you're in cowtown, and use it if things take a turn for the worse.
Sorry if I have offended anyone in this discussion, that certainly wasn't my intention.