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Premium Aragonite Reef Substrate: Ideal For Reef System Tank Bottoms, Denitrifying Anaerobic Beds, Extremely High Surface Area Filter Media. Aragonite Benefits: Reduces Nitrates. Maintain Ph. Increases Carbonate Hardness. Provide Marine Trace Elements. Pr

Pure Water Pebbles Turquoise Aquarium Gravel 5lbs (grain Size: 3.1-6.3mm). Use Them In Your Aquariums And Ponds To Make The Floor Bottom Look Great. It Provides Living Space For Beneficial Microbes And Anchoring For Plants. It Also Helps With The Filterin

Every Grain Of Sand In The Ocean Is Covered With A Biofilm. Natures Ocean Bio-activ Live Aragonite Is Naturally From The Ocean. The Bacteria On The Sand Are In A Biofilm, Therefore The Bacteria Are In Their Natural State, Immediately Removing Toxic Waste.

Benefits Of Premium Atlantic Crushed Coral: 100% From The Ocean Floor. Natural Crushed Coral Gravel. Maintains Superior Ph And Marine Chemical Balance. Provides Maximum Surface Area For Biological Nitrification. Scientifically Graded For Uniformity Which