Its not gonna stop. Mine did that when I had him and well at first I didnt know what he was doing so I kept moving the gravel back and he would pile i up and clear a hole everytime I did that, so I gave up. Then I read about it online and stuff. He pretty much making his home and thats also where he will attract his mates and if he were to find a mate then I guess thats where they do there thing. Anywho cichlids dig... and its not gonna stop unless you can talk to your fish and it listens to you.. plus if you acutally sit there and watch it... it can be rather entertaning after awhile..