New startup/water

[Gyerfat]

I was wondering in my new tank my ammonia is dropping and nitrites are spiked. If I add some old water from my other tank will that help or hurt. My other tank water is pristine imo.

 

[Gyerfat]

Update this morning. My nitrites are now at. 25

 

[Randy Holmes-Farley Verified Community Expert]

Water may help a little, but most nitrifying bacteria are on surfaces, so adding some sand or rock will help the most.

That said, nitrite is no concern in cycling. it is not toxic in a marine system. Only ammonia is a concern.