( Best selling product )
Features Chemical filter media Removes trace metals toxic to sensitive fish, organic contaminants, discolorations and odors Creates sparkling, crystal clear water Made of bituminous carbon – long lasting, highly porous and absorbent Provides large surface area for adsorption of impurities Will not raise phosphate levels Ideal for use with most canister filters Convenient 800 g / 28.2 oz format For best results, replace every 4 weeks Mesh bag included for use in sumps and large filters (for bulk sizes only)