Paul, that is a 185,000 system comprising many tanks, plus a variety of off system tanks that are essentially identical to home aquariums. No epizootics at all in a decade proves that the quarantine process I developed works. Sure fish died during that period, but not from parasitic disease.Jay my friend, I knew you would say that thats why I said:
With the emphasis on "home". Your 185,000 gallon tank is not exactly a "home" tank as fish would not be stressed in that tank and the fish think they are in the sea.
If you did not quarantine that tank, I doubt you would have any fish die from parasites as I have never seen a fish in the sea dying from parasites under "normal" conditions and I have spent about 400 hours underwater. Overheating, typhoons where fresh water fills the bays and an abundance of RAP music will stress fish no matter where they are and they would die from something.
But immune fish such as many of us have will never die from a communicable disease "under normal conditions". If the house goes on fire, well maybe they will die, but not from parasites or as I keep saying, my tank would not exist.