Fishless cycle

[Puffer555555]

I'm doing a fishless cycle and I know that around one week there should be an ammonia spike. How much of a spike am I looking for in terms of measurement? 0-8ppm

 

[paulace2372]

That will depend on what the source of the ammonia is. If it's live rock then it will depend on how much and a few other factors. I wouldn't worry too much at this stage about the level of spike. Keep an eye on the level dropping and the nitrogen cycle beginning to work.

 

[E249]

Also when you get fish you might want to get hardy fish like damselfish. When I first put fish in my tank the ammonia spiked and stayed up for a while but I only had damselfish in there and they were fine.