Cycling How Long Should Cycling Take If I've Used Things From A Previously Established Tank?

How long should cycling take if I've used things from a previously established tank? - cycling

We have our new 3-Bike "tank (200L, 52 gallons) for a week. We have to do with the predetermined filter tank and ornaments. I would say that 20% of the water tank is old. Since the filter has already levels of bacteria on the inside, how long do you think cycling is to take? "I wanted to wait about 3 weeks, and I'm not sure ...
Thank you to everyone who helps: D