Help eliminate harmful contaminants and keep your fish safe with the Fluval Underwater Filter Poly/Carbon Cartridge. The dual-sided cartridge features a polyester filter pad on one side to remove fine debris and contaminants and carbon on the other side to also remove dangerous contaminants along with colorants and odors. This replacement filter cartridge is suitable for freshwater, marine or reptile environments and is specifically designed to perform the second stage of the filtration process in the Fluval Underwater Filter for Aquariums, Size U4.
Item Number | 124977 |
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Weight | 6.72 ounces |
Dimensions | 6.7 x 2.8 x 1.8 inches |
Aquarium Type | Freshwater, Saltwater |
Tank Size | 56 to 75 Gallons |
Season | N/A |
Fish Type | Tropical Freshwater, Marine Fish |
Material | Plastic |
Change filter cartridge every 30 days
Ensure your system runs smoothly with this Fluval Underwater Filter.
Bought this due to it recommending it as a compatible filter for rf-s top fin product and it is completely WRONG. Why are filters impossible to locate or fit in my tank?!
I use fluval products for my underwater filter systems they are great!
Massive turtle poo. Not sure what else is needed. These go with my Fluval F4 and that’s all I got to say about that..............
WATER IS GREEN AFTER 4 DAYS, I changed 3/4 of water and again in four days I could barely see my fish. never had this problem before using this system. Wasted my money and my time with this product. My service from Chewy was GREAT ,just a bad choice from Fluval!!!!
great price for an amazing product, i use this in my res turtle tank and it keeps the water crystal clear
This protest is great and greater still is Chewy.com. Getting ready to order again!!!
There are two, one with carbon, another with just charcoal. This one works very well, but the other one does not work well at all in my experience. With the other one, my turtle tank water got murky after two days. With this one it has been crystal clear for two weeks now.