TTA, The part I skimmed was dosage/pond acre etc. This is what I was objecting to from the article you cited:
A good water quality monitoring
program can help prevent brown
blood disease. Pond water should
be checked for nitrite two to three
times a week during fall and
spring, and at least weekly the
remainder of the year. We recommend
maintaining a chloride-tonitrite
ratio of at least 10:1 for catfish.
Check ponds daily during a
known high nitrite incident, even
if adequate chlorides are in the
ponds. Also check chloride after
periods of heavy rain or active
flushing from well water; both
these events can dilute chloride
concentrations and reduce the
chloride:nitrite ratio
This says (paraphrasing) nitrite needs to be checked 1-3 times/week & sodium chloride needs to be present since nitrite may show up any old time. Also some species are more tolerant of nitrite than others. I can agree with that to a point. Zebra danios are a classic "cycling fish" because they can live through many adverse conditions...so what if they only live a year or so from some beginner's mistakes? Farmed fish are harvested in a relatively short amount of time, much less than I expect my fish to live.
TTA, I'm sorry you seem to take my comments it as a personal attack, I certainly didn't mean it that way. I too, have kept fish for 40 years & in our early days didn't really understand the nitrogen cycle. Although our 1975 Little Golden Guide to Tropical Freshwater Fish does mention it (our first fish "book"). It says with an under gravel filter it takes about 2 weeks, LOL. As I've said before, you often have very good articles you cite & I appreciate that even though I admit to skimming parts.
There often different ways to keep fish, treat diseases, etc. successfully. I had only a brief 1 year experience with discus & joined a group to learn more. I was shocked by some of the treatments experienced people did to their fish for suspected diseases. But discus are expensive, overbred & can be surprisingly sturdy for some things, others not so much. Same with some "herbal remedies", they work in some cases. & loach keepers have their own set or "rules" that seem to work most times. I "try" to limit myself to own experiences, water conditions, fish & plants but not always...we all have opinions, lol.