Professional Aquarium Gravel Cleaner - The Professionals Secret to Naturally Maintaining a Healthier Tank, Reducing Fish Waste and Toxins, 16 Ounces Treats 960 gallons NATURALLY, CREATE A HEALTHIER AQUARIUM &gt; Our Professional Grade Natural Gravel Cleaner introduces healthy, natural bacteria that biologically eliminate excess fish waste, fish food, toxins, odors and other organic wastes that accumulate in your aquarium. This leads to cleaner, clearer water, and a happier, healthier fish tank without the use of chemicals. EXTEND YOUR TANK MAINTENANCE &gt; Our professional grade, non-chemical formula will extend the time between water changes and gravel cleanings by gently and naturally eliminating organic waste and toxins that accumulate in your aquarium. It also helps correct for overfeeding and lack of proper maintenance too. MAKE YOUR AQUARIUM WATER FISH SAFE &gt; Our gravel cleaner not only improves water quality and clarity and minimizes odors, but also naturally reduces the build-up of toxic ammonia and nitrite as well as problem-causing nitrate and phosphate found in your tank. PROFESSIONAL, EASY, ONE-STEP APPLICATION &gt; Simply add one capful per 10 gallons to your Saltwater or Freshwater aquariums. That's it, done! Our 16 oz bottle treats up to 960 gallons, now thats value. OUR PROMISE &gt; Made in the USA. Buy with confidence. Natural Rapport's Gravel Cleaner has our customer promise of "complete product delight". We are a family-owned business passionate about making wholesome, natural products with incredibly high standards keeping your beautiful, exotic fish safer and your fish tanks healthier.