Quin-Phos Anesthetic Solution (2-methylquinoline) is the next generation anesthetic for koi. Koi go out quickly and recover quickly. Quin-Phos comes as a two part kit that when mixed together into the larger ‘Bottle B’ makes a 8oz. solution that will treat 48 gallons of water. Once mixed together the solution will last 2 weeks if refrigerated, or mix just enough from both bottles to treat your koi as needed.