Aquarium Products Gel-Tek Ultra Cure BX helps to control internal and external bacterial infections such as septicemia, kidney disease, wasting disease, and bacterial enteritis. It also reduces secondary infections arising from sporozoan diseases such as neon tetra disease (Pleistophora). Ultra Cure BX reduces the effects of infection from flavobacterium columnare and fin rot that results in ulcers and open soars. Gel-Tekís Ultra Cure BX contains fish pheromones to entice and enhance feeding behavior without clouding the aquarium water. Safe for all freshwater and saltwater fish.