It is hit or miss with jardini. Be prepared to get rid of something or him when the time comes that the jardini goes crazy ( 8" or so). I have a leichardti and it is night and day compared to a jardini . I had him a way too small of a tank and he would mock bite (no damage) some smaller fish to show dominance but now he is in a proper tank and absolutely no problem. I have similiar fish as well as 20 different shapes and sizes of fish. It is more expensive but seriously consider a Leichartdi or Black Arowana.