Welcome aboard Amp. One great suggestion that Wasserpest, and one I didn't follow myself, is to wait before adding fish. This is especially if your using a do it your self Co2 system. If your not careful with and diligent in changing your Co2 mixtures it can cause some really big Ph changes. My poor little Otto didn't like that, may he RIP. Same goes with ferts. I wouldn't use them for the first month or unless your plants tell you they need 'em. Again this was a tough lesson for me to learn and I'm still battle algea to this day. And the best advise of all is get real familar with the search fiture of this board and read and read and then read some more.