Wow. I'm not sure what I'm doing right (wrong) then. I got my Oscar at about 2" in July. He's now almost 13". I (over)feed once per day with Hikari Gold pellets, some purchased crickets about once a week, and some occasional leafy stuff thrown in (he went nuts night before last for some zucchini. He's bulked out to the point where he's almost fat. Currently, he's waiting on me to finish my 125g tank and has been living in an 55g with an 8" Severum this whole time who constantly picks on him. I do 70% water changes about once a week.