tank size is 100 g and the flowerhorn is a good 6 inches and i'm not gonna lie he is pretty mean. i just wanted to know the temperament of oscars since i don't know too much about them. this is a growout tank that also is stocked with a few other SA/CA cichlids to deflect his aggression which includes jag, midas, carpintis which are pretty aggressive as well. but it sounds like the oscar is rather mild tempered for a big fish. some of my fish will be moved to 2 other tanks and i wanted to know if the oscar could be housed with the flowerhorn.