Wave Point 5 lbs Premium Virgin Activated Carbon Charcoal Pellets in 5 Filter Media Bags (Free) for Aquarium Fish Tanks Koi Pond Canister Filter Reef Filters, Air Filter & AC, Total 5 lbs (1 Gallon)Brand: Wave Point Color: Black Features: Carbon Pellet Length (approx.): 0. 3 0. 5 inch; Carbon Pellet Diameter (approx.): 0. 1 inch (4 mm)**Carbon is bagged in mesh bags and enclosed in individual plastic bags.** Low ash content and phosphate output activated carbon is safe for freshwater, saltwater, reef, pond environments, air conditioning, and air filters. Eliminates odors, discoloration, impurities, and dissolved organic wastes from aquarium