Nobody could give you an exact answer to the amount of time it will take, but if you check the water parameters, when the ph is between 6.5 and 8, ammonia is 0, nitrite 0 and nitrate something like 5 (not so sure about nitrate) then the tank is cycled. Cycling usually takes months, so i'd stick in your axie just whenever it's a safe level. You'll need to clean your water out more regularly until it's cycled.