Just before I get the 4 little pbass I have one last question. I have an aquaclear 110 on the 20 gallon they are going into but I have some concerns that it may be too powerful as some fish have gotten stuck to the intake in the last couple months. I am unsure if they were already suffering from some other ailment but have any of you ever had this problem? I almost feel like putting them into the 90 gallon with a tank divider and feeding the oscar less with dialy water changes might be a better idea, what do you guys think?