There is tons of evidence of here that would suggest otherwise. 1-4 weeks seems to be the normal on here. My dt was cycled in under a week with two clowns using turbo start and my coral qt and fish qt both cycled in about two weeks not using turbo start. I don’t think
@brandon429 will respond but his stuck cycle thread has more than enough info on length of time it takes.
If op used turbo start I would lean to something being wrong with the fish rather than ammonia building up that fast and being processed that fast. I would think if ammonia levels were high enough to kill a fish the tank couldn’t cycle that ammonia fast enough to get back to zero