Can I just plumb in a 125 gallon tank to my system. Well I know I can what are the steps I need to take to do it. I have a 100 gallon sump and a 75 display now. I want some fish that I just can't put in my reef tank so if I add a predator tank I get the best of both worlds. I am thinking live rock and sand only maybe some coral but if that system need to cycle how do I add it without disturbing what I have up and running