This next deal from Aquarium Supply is a 25lbs bad of Gravel Substrate for freshwater aquariums. This premium gravel adds a beautiful touch to your aquarium or fish tank. Designed specifically for use in freshwater aquariums, gravel will not affect water chemistry in any way, and provides a great place for beneficial bacteria to colonize. Whether you're looking for a bright substrate or something for your natural tank, pure water pebbles are exactly what your tank requires. If you would like to buy this Gravel Substrate for your tank just click the picture below!