Cycling tank, how long and can i add crays

[CArlina]

I am currently cycling my 120L tank and was wondering how long it should cycle?

I cycled it with mollies.

Also can i add crays in early stages of cycling? 3 days?

 

[Mumma.of.two]

I am currently cycling my 120L tank and was wondering how long it should cycle?

I cycled it with mollies.

Also can i add crays in early stages of cycling? 3 days?

How are you cycling exactly?
It takes 4-8 weeks usually but can take longer. Your tank is cycled when you have 0 ammonia and nitrites and rising nitrates.
I would advise not to add anything else until after the cycle is complete. The crays will add to the ammonia.