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The Spec/Evo/Flex Foam Filter Block provides effective mechanical filtration by trapping large particles and debris
soft water (<15 dGH)
A tank of at least 30 gallons or larger with a sandy bottom
The head and face is black
Fluval C4 Ammonia Remover Peppermint The Spec/Evo/Flex Foam Filter BlockAmmonia Remover for C4 Power Filter, 10. 2 oz 290 g, 3 Pack Designed for use with the Fluval C4 Power Filter, C4 Ammonia Remover effectively removes and controls ammonia and nitrite, which occur naturally as waste breaks down in an aquarium and are toxic to fish and plant life. Compatibility C4 Power Filter Features Chemical filter media Ideal for new or heavily populated freshwater aquariums Reduces fish stress Convenient 3 pack format 3 x ammonia