Item #01202 (Gallon)Treats up to 512,000 gallons Item #32203 (Quart)Treats up to 128,000 gallons Item #16224 (16 oz.)Treats up to 64,000 gallons                     Koi Protector is an effective probiotic formula of live bacteria, enzymes and micronutrients that dominate the pond water through a process known as competitive displacement. When used on a regular basis it ensures the rapid build up of the beneficial strains of microbes to promote a healthy pond environment that allows nature the ability to defend against conditions that cause disease in koi and a wide variety of other fresh and saltwater fish.