NT LABS Koi Care Sabbactisun ~ Herbal Pond Additive helps to support fish recovering from bacterial infections. Use Koi Care Sabbactisun when fish show red wounds, ulcers, missing scales, clamped fins, blotches, fin-rot. Sabbactisun can be used while fish are being treated with suitable medicines. For best results use when temperature is above 18 C. Safe for all fresh and brackish water fish species, invertebrates and aquatic plants. A 500ml bottle contains enough to treat 10 applications of 5000 litres.