please suggest some tank mates for a 7 inch silver. he is currently with 3 senegal bichirs and a pleco. the reason i want some tank mates is because he does not eat infront of me was hoping if he sees tank mates eating he will start also. trying to get some datnoids but hard to get and expensive. so thought of 2 tiger oscars ? would tht be a good idea ? or would they attack the arowana? thx :]