Pico ?

So i have my first pico cycled and ready for coral I have a Kenya Tree in there right now that i am using as a guinea pig. It is extended and looks happy. I am wondering about water changes for a pico? I know that nitrates climb incredibly fast in such a small tank. How big, in percentage, should my water changes be weekly? A water change maybe necessary even twice a week? I am wanting to put zoas and ricordeas in the pico!
thanks

 

depends whats in it, I've known people that do a 1 gallon change every day(from there main tank).

 

You mean like a swap or a change?

 

they take water from there big tank and put it in the small one. Ofcourse if your big tank is in bad shape just use new water. if you don't have stuff you need to feed in the pic you probably won't need a change every day.

 

cool. that explains alot. Thanks.