Slowly raises the ph of pond water making it more alkaline without harming delicate pond fish or aquatic plants. A low ph can stress pond fish and suppress the activity of the biological filter. Contains no algae-promoting phosphates. Size is 16 Ounce. Dimensions are 2.37 X 2.37 X 8.37 Phosphate-Free And Nitrate-Free. Will Not Promote Algae Growth. UPC Code = 317163161715