Fluval Poly/Carbon Cartridges features two sides for effective chemical filtration, the crucial second stage in the filtration process. The polyester filter pad side filters out fine debris and contaminants. The Carbon side filters out harmful liquid substances, colorants and odors. For freshwater, marine or reptile environments. For U series filter model: U4
- Fuval Filters Review by Joy
Your Rating [...]The price is excellent.Thanks. (Posted on 3/10/11)
- FLUVAL U4 Poly/Carbon Cartridge Filter Review by Shubunkin Love
Your Rating Because the U4 Poly/Carbon Cartridge is replaced every other week but the aquarium is cleaned every week, cleaning the cartridge with aquarium water in the sink with a medium-soft brush works well. (Posted on 3/10/11)
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