A-7690 Plant-Gro CO2 Natural System   - CO2 Stabilizer - CO2 Activator - Colorful display box - Designed for tanks up to 20 U.S. gallons (75 l), for larger aquariums use multiple units Product Manual - Adobe Acrobat File The photographic product images on this web site may not exactly reflect the product. Design revisions and color variations may exist.