Ruby Reef Rally PRO is a broad-spectrum， copper-free treatment designed to be used directly in your marine or freshwater aquarium’s display tank. Safe for all fish， coral and invertebrates， it’s designed to eliminate external parasites， dinoflagellates， clownfish disease， gill flukes and more. It also treats gram negative bacterial infections， like fin and tail rot， and helps prevent secondary infections. Rally PRO is also effective for the rapid control of dangerous and destructive infestations such as marine velvet. Help your finned friends stay safe and sound with this special treatment hard at work in their underwater home.