ASF Zap-Tasia is a safe and easy way to remove unsightly apatsia from your reef aquarium. All the applicators are including in the box, simply empty a vial into the pot provided, using the syringe draw up the Zap-Tasia solution and squirt the syringe as close to the aptasia as you can. Zap-Tasia is completely reef safe and contains 20 vials in the kit