I have no idea how high Nitrites effect fish. can only go on what I read. Does this sound familiar from 4 years ago?Not correct at all.
I never watch nitrites. As soon as ammonia goes to 0 i place fish in.
Nitrites have to be very very high up in 300ppm to 500ppm to cause only 25% of the population to be effected.
Nitrites are not harmful in saltwater. not in levels we see. Even if you start with high ammonia nitrites normally dont get above 8-10 or even 20 ppm and thats not harmful.