50 gallon cycle?

[ThomasG07]

Any one know about how long the nitrite spike during a fish in cycle lasts?

 

[Wayne78]

Hi
Mine lasted only 4 days but can go on for weeks!
Just remember to keep it low though because it is toxic to fish

 

[ThomasG07]

I'm using API stress zyme

 

[jetajockey]

It can last 2-3 weeks during a natural cycle.