The Smartpond Sludge Remover WTNSR18 is a water treatment product specifically designed for ponds. Made by the brand Smartpond, this 18oz bottle of sludge remover is suitable for removing sludge and debris from pond water. Manufactured in the United States, this product helps maintain clean and clear water in ponds and water features. Perfect for keeping your pond looking its best, this new and sealed product is a must-have for any pond owner.