Enhance the well-being of your marine life with Dr. Tim's First Defense. This 4oz water additive is specially designed to relieve fish stress and promote a healthy aquatic environment in reef aquariums. Made in the United States, this product is a great addition to your pet supplies collection. With a tank capacity of 240 gallons, this water treatment is suitable for large aquariums. It is a must-have for pet owners who want to maintain their marine pets' health and happiness. Get Dr. Tim's First Defense today and give your fish the care they deserve.