Item 243 Your Price today: $ 5.77 Currently out of stock. Call or e-mail for availability info, or else click here for a form to tell us how many you wanted to order. Premium activated carbon that is up to 3 times more effective than other carbons. Great carbon performance. Laboratory tested and proven more effective at removing foul odors, unsightly discoloration and harmful dissolved organic waste. From Marineland, formerly Magnum carbon.