I prefer not to “hot start” a tank with bacteria and fish, a mature microbiome is better. However, that is better than what else we see here all to often - tanks being started with no bacteria at all!Not sure anyone has suggested - adding ammonia to a fish tank. Instead - the comment would bode of course thats not recommended. Instead - To start a tank - one can add bacteria and a reasonable amont of fish with no problem Interested in @Jay Hemdal opinion
Ammonia is the killer, if ammonia doesn’t rise above around 0.25 ppm, the core issue is something else.
Jay