I have been cycling a 55g tank recently to uncrowd a smaller tank. My question is, which fish do introduce first and last to the tank. I plan on putting my 3" chocolate pleco, 3" oscar, and 6" jack dempsey into the tank. It is not quite ready, but I would like some feedback as to which fish gets introduced when. I am thinking the jd will have to go last. Thanks for all the help, I love this site!!