Instructions: For optimum landscaping, use 2 lbs. of gravel per 1 gallon of water. Instructions: Rinse well in tap water to remove loose particles before use. Do not scrub or rub together. Do not use soaps, detergents or bleaches. Wash hands before and after handling. Suggested uses: Create your own unique aquarium environment using one or more colors. Natural underwater settings can be recreated by combing various colors or textures. Enhance the depth of your outdoor goldfish or koi pond with colored gravel, gradually using lighter colors at the edges and darker colors towards the greatest depths.