As for me, being a respiratory therapist, why would one sacrifice their own health or anyone else for a disease that basically will put legions into the apicies of your lungs, then have me give you breathing treatments and eventually put you onto a ventilator to breath aka life support. Treating TB is costly, and a long progress (around 2+ years) that is if whatever (you/fish or whoever) has it does not get a drug resistance from the antibiotics, then your screwed.

I am quite sure the inhabitants in this aquarium are not the last of the species in the world and are readily available. So please take the advice of the knowledgeable people here and do the tank a favor!

As Ronald Reagan would tell you: "Tear down this aquarium"