You, my friend are derailing the mans thread. I kept a Midas with a coke bottle half full of water, he liked pushing it around the tank! Bottom line is it's a crapshoot adding any fish together, loads of people think that a Jack Dempsey can coexist with an Oscar and many times thats true but in my younger days of fishkeeping I had two Oscars killed by a Jack Dempsey. People like movement in there tank so I made a recomendation to him. Sometimes it works out sometimes it dont .