SODIAL is a registered trademark. ONLY Authorized seller of SODIAL can sell under SODIAL listings.Our products will enhance your experience to unparalleled inspiration. SODIAL(R) Aquarium Blue Double Sided Sponge Cleaning Brush Scrubber Cleaner Scrubbing away algae or other impurities, For use in freshwater and saltwater. Nonslip plastic handle, easy access to hard to reach spots. Let your fish tank more clear and beautiful.