The addition of new bacteria makes StableFresh Super Concentrate even more effective in consuming waste and odor than ever before. This all-natural, enhanced formula biologically consumes urea and the related odor instead of just masking it. For just pennies a day, your stable air stays fresher so it attracts fewer flies. Tests have also shown that StableFresh Super Concentrate also reduces the number of spiders found in a stableso there are fewer spider webs to remove! The original strain of bacteria has also been strengthened so it lives longer and continues consuming urea for a greater period of time. USDA approved and environmentally correct. 16 ounces. Made in USA.