What levels of Ammonia and Nitrite are lethal?

[StanTheBetta]

I was wondering what levels of Ammonia and Nitrite are lethal and what are just stressful?

I dropped a few too many fish in early and I've been doing daily 10-15% water changes to keep ammonia down its pretty steady at .5 ppm with one of the aquarium pharmaceuticals dropper test kits.

Its been over a week and nitrites are still at 0 so I'm guessing this is gonna take a while

 

[njparton]

I was wondering what levels of Ammonia and Nitrite are lethal and what are just stressful?

I dropped a few too many fish in early and I've been doing daily 10-15% water changes to keep ammonia down its pretty steady at .5 ppm with one of the aquarium pharmaceuticals dropper test kits.

Its been over a week and nitrites are still at 0 so I'm guessing this is gonna take a while

Yep, maybe 4-6 weeks before the cycle is complete.

Different fish are susceptible to different levels of ammonia and nitrite so it's hard to give a definitive answer.

However, any fish kept in an environment with even low levels of ammonia/nitrite for long periods of time will be susceptible to disease etc.

 

[thecichlidaddict]

Don't let ammonia get past the .5 mark if you can help it. Even when it isn't killing fish, it is still donig damage if it is present in the water.