+1 on using a quarantine process, or just going ahead & prophylactically medicating fish and/or corals (ie- assuming they are already infected & treating them in a separate system, before transfer into a main display).
In a hospital tank you can manage risk better than in a display tank. Some run two separate treatment and QT systems. One for fish & another (separate) tank for corals. Others have even set up invert QT systems as well.
Another approach is to use an appropriately sized UV filter (but run it after cycling the tank). While it works for ectoparasites which have free swimming stages, it may not help on fish already infected with bacteria, viruses flukes or fungi.
Fwiw,
this business of disease mitigation is such a big deal that some businesses have specialized in providing pretreated specimens. The ARC Board has also had discussions on how & whether we should try to do something as well?
In a hospital tank you can manage risk better than in a display tank. Some run two separate treatment and QT systems. One for fish & another (separate) tank for corals. Others have even set up invert QT systems as well.
Another approach is to use an appropriately sized UV filter (but run it after cycling the tank). While it works for ectoparasites which have free swimming stages, it may not help on fish already infected with bacteria, viruses flukes or fungi.
Fwiw,
this business of disease mitigation is such a big deal that some businesses have specialized in providing pretreated specimens. The ARC Board has also had discussions on how & whether we should try to do something as well?