A formulation specifically designed to help you find an area of water loss. A dark colored blue solution that collects at the point of water loss to indicate the leak area. Non-toxic, safe to use. Our Money Back Guarantee: if you are unable to find the leak using this product & you purchase a new replacement liner with us, we will refund you the price of this product. Directions: You need to lower the water level down to almost where the leak is. You cannot just put the solution on the top and expect it to go to the bottom. 8oz bottle.