wooden_reefer
New member
Again, try some reading. Take it from someone with a degree in environmental microbiology from USF.
Stress matters more than you know. That's why the best treatments for ich have nothing to do with copper. Copper is easy and popular. Study the life cycle or the organism. Hypo salinity or tank transfer is the best way to beat marine ich(it's too labor intensive for most).
Stress matters a lot in selective situations and many pathogens.
Diseases like internal fungal and internal bacterial infection, higher order internal parasites, are stress related.
There are two situations when stress is a non-factor at all.
The first is ich and some protozoans. Ich really is not a disease in the ocean because the parasite's survival characteristic is severe population control. Ich leaves the fish as a part of its lifecycle and infestation is by design extremely low and the host has no need to quickly develop immunity against ich to improve its life. Such relation (indifference) will be the dominant factor and hence fish is not required in the ocean to enhance immunity. This is not going to change in the tank. And, no enhancement is going to deter ever increasing greater waves of attack.
The aquarist should completely disregard the whole idea of stress and immunity as far as ich is concerned. Eradication is the only practical approach.
The second situation is a pathogen (often bacterial) to which a fish has no previous exposure. In a situation like this, a fish relies on general defense like WBCs since it has not yet developed antibodies. In such a situation, the concentration of pathogens is a critical factor; thus the closed nature of a tank is decisive until mild exposure and antibodies.
Stress is additional and excellent water quality is necessary but insufficient.
The closed nature of a tank is a decisive feature.
Those 5 walls! Often the decisive consideration.