I'm trying to find a catfish for stirring up the sandbed in my 330g. I've had giraffe cats before and they are fantastic at that, but in my experience they always end up becoming pricks, chasing other fish, etc. Oxydoras niger comes to mind, but I don't want anything that big. So my thought was to find a smaller doradid cat perhaps... But not too small. Anything under 7-8" would probably be eaten by my big old widebar dat... Any suggestions or ideas?