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I have a 75g tank that has been set up and running for 6 years. All the livestock has now passed on (finally the last tetras died of old age) and I would like to convert the tank for Malawi haps.
Long story short, a couple years back I had a batch of rainbows that I am convinced had fishTB. I have kept the tank quarantined since then.
I would like to sterilize everything before I put new fish in to wipe any trace of TB. I would like to salvage the filter media (Eheim cannister with sintered pellets) but sterilize it also.

Can I just dump a bunch of potassium permanganate in the water and let it run for a couple of weeks and call it good? Is there a better way?

thanks
-jen

that sounds like the best way,
just put it in til the water is deep purple
after it turns brown give it 3 or 4 100% water changes

sounds like a plan.

I will be coming down to spend way too much money on new fish as soon as it is done

God Bless!