Ok, so I have this maroon goldbar clown that came with my first tank. Ever since I had him, he has been disturbing the sand with his tail. I feel like every time he sees me, he does that on purpose. He does this frequently and digs up passages, and after he is done, he keeps trowing sand all over my new acans. Someone please tell me what can be done or perhaps explain this behavior. The guys at my fish store told me that he wants to mate.