IMO, once the tank has been contaminated with vibrio, you're pretty much done with the everything but the glass. This happened in my 37g tank back in....2007,2008. Yes, the pretty tank you see today. But when it came down with the infection, I ditched EVERYTHING in there that was live. The rock had to go, because I didn't even trust boiling it. Sand is "cheap" and easy to replace, so out it went. The bare glass tank got a thorough cleaning with a strong bleach solution, then multiple rinses before coming back in the house. Even then, I left it dry for a good long while before starting over.
I *did* re-use a few of the fake decorations after a bleaching and boiling session. I wouldn't trust boiling alone (see the rock comment above) but between bleaching and boiling I felt it was safe. All the fake stuff left eventually anyway, but I feel that it was safe enough after those cleaning techniques.
Vibrio isn't something to mess around with. Trouble is, there's no REAL way of determining if the infection you're looking at is vibrio or some other bacterial agent...without a lab in your back pocket, you're pretty much limited to guesstimates. Furan-II is a good shotgun antibiotic because it's effective against both gram-negative (vibrio, for example) and gram-positive bacteria such as mycobacteria. It should be used sparingly, as in all antibiotics, to reduce the risk of producing anibiotic-resistant bacterial strains. I know that may sound like chicken-little talk, but heck, that's how we got mrsa and vrsa...and I'd hate to see a MRSA-style mycobacteria show up in our world!!
