A great way to avoid making the unwanted bacteria resistant and to prevent loss of good bacteria;
> Cycle the filter media in another tank, using underdosages
> Transfer the cycled media into the tank that needs treatment
> Now you have resistant colonies so you can safely kill the bad bacteria!
I always cycle with melaleuca and I try to always have cycled filter media ready to replace old media. That way I don't have to re-cycle my big tanks too often. (this is a great way to put spare undersized tanks to use!)
> Cycle the filter media in another tank, using underdosages
> Transfer the cycled media into the tank that needs treatment
> Now you have resistant colonies so you can safely kill the bad bacteria!
I always cycle with melaleuca and I try to always have cycled filter media ready to replace old media. That way I don't have to re-cycle my big tanks too often. (this is a great way to put spare undersized tanks to use!)
only problemm i can see is, if you cycle with fish you will still run the risk of producing resistant, bad bacteria, and transfering it to the tank to be medicated. if you do it with a fishless cycle, you will always need to dose the tank with ammonia. even the best fishless cycle, will take too long to start a colony. and be any use to use as a medical aid.