Will drugs kill the bacteria?

[squidworth]

I have a hospital tank that is brand new. I put NITROFURAZONE in it, will it kill the starter filter media I put in there from show tank?

 

[beth]

Antibiotics kills bacteria, so, yes, there will be some diminished capacity to the bio filter of the QT, especially a developing QT.
Are you treating a fish?

 

[rockster]

All susceptible bacteria, including the beneficial denitrifying ones will be killed by nitrofurazone. But not to worry, as these are ubiquitous and will rapidly recolonize your tank given the proper environment.