a new addition

[neko2009]

:help: i have recently purchased four common goldfish who have now been together for a week. my fella would like to get one more but we are unsure if it is safe to add an outsider into this group of four. any help with this query would be very much appreciated.

[Northernguy]

I really need to know how big your tank is first?
What kind of filtration you have,they carry a large bio load!
Is your tank fully cycled?
Here is some more info for you!
http://www.aquaticcommunity.com/goldfish/goldfish.php

[Gayle]

Add to what NG asked, do you have another tank for QT?