ello, ive had some malawi's for about a year now and ive had no problems at all, ive added 2 new fish yesterday so i changed my rocks around to try introduce them. Ever since adding them a fish as been attacked alot and now he is sitting on the bottom of the tank with nibbled fins. Also one of my new fish tht i added yesterday, i found dead this morning, ther was nothing visibly wrong with him. HELPPPPPPPPPPPPPPPPPPPPPPPP