NT labs Chloramine T reduces bacteria and parasites in pond water. During cold weather (autumn and springtime) the use of a NT Labs Koi Care Chloramine T to keep parasitic protozoa numbers low in ponds until fish are stronger, more active and can resist them better is recommended. At low temperatures when fish are slow the fish's immune system becomes equally sluggish, presence of parasites in these circumstances can compromise the fish before its immune system has started full
activity as in the summer.