yes we know mixing the clown species doesnt usually go well, but before we did it we ask on this site and were told that it would be fine, but besides diggin together they ignore each other. our clarkii are bout three inches and bully around 1 1/2 to 2, so he doesnt bother them, even during feeding time.
he's not that territorial bout the water around his area, just the sand. he wants nothing but him in his sand area, and apparently the top of the water where i barely but finger tips in to get the flakes in