Description
The Fluval Poly/Carbon filter cartridge features two sides: The polyester filter pad side filters out fine debris and contaminants. The active carbon side filters out harmful liquid substances, colorants and odors. Replace every 2-4 weeks or when flow rate is noticeably reduced. Replace one at a time and never both together.
for Fluval Internal Filter U2, Fluval No.: A490, content: 2 pieces
for Fluval Internal Filter U3, Fluval No.: A491, content: 2 pieces
for Fluval Internal Filter U4, Fluval No.: A492, content: 2 pieces
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