how long should I wait between fish when stocking my tank

[surfer1712]

My tank just finished cycling about a week ago and I just bought two fish. One yellow tang and one percula clown. How long should I wait before adding another fish without overloading the biological filtration?

 

[Mutz]

If I were you I'd wait at least 2 weeks...closer to a month would probably be best. I added 1 fish at a time in 2-3 week increments and had no problems. But IMO you probably should have added the tang last - they tend to be very territorial and can pick on new tankmates.