Does this fit the fluval 13.5 gallon evo?

I use it with a 9 gallon fluval tank. It works.

i have Top Fin filter on my 20 gallon tank , well i really dont know where do i place this carbon ?

Carbon should be the last thing the water touches before returning to the tank with the exception of a polishing pad. This is so ammonia and nitrite can be processed by the food bacteria before the carbon leeches it out of the water. Each filter is different so look at how the water flows in your filter for best placement.

How often does the foam filter need to be replaced?

For the health of your fish you should replace the mechanical filter, the foamy thing, at LEAST every 2 months. This isn’t a sweater that you wear and replace when it’s worn out. Who ever gave that advice doesn’t know their @$$ from a hole in the ground.

Is it possible to cut a third opening in the middle for an additional biomax bag?

Yes you could but that would mean you would have very little mechanical filtration. There won't be enough media left to filter anything.

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Fluval Spec/Evo/Flex Activated Carbon, Replacement Aquarium Filter Media, 3-Pack, A1377,Black

Product ID: 2119070

Details

Brand
Fluval
Item Form
Granules
Item Weight
5.82 Ounces
Liquid Volume
34 Liters
Number of Packs
3

💧Crystal-clear water clarity

🧪Research-grade carbon purity

♻️3-pack replacement convenience

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Description

💧 Keep your aquatic world sparkling — because your fish deserve the best!

TRUSTED LEGACY - From Fluval, pioneers of aquarium innovation since 1975
EFFORTLESS MAINTENANCE - 3-pack inserts ensure continuous, hassle-free water purification
MAXIMIZED SURFACE AREA - Premium carbon granules absorb impurities with unmatched efficiency
TAILORED COMPATIBILITY - Specifically engineered for Fluval Spec, Evo & Flex aquarium series
ADVANCED CHEMICAL FILTRATION - Eliminates heavy metals, odors & discolorations for pristine water

Fluval Spec/Evo/Flex Activated Carbon is a premium, research-grade chemical filter media designed exclusively for Fluval's Spec, Evo, and Flex aquariums. This 3-pack replacement set efficiently removes heavy metals, odors, discolorations, and pollutants, delivering crystal-clear, sparkling water. Trusted by aquarists worldwide, Fluval continues its legacy of innovation and quality in aquarium care.

Specifications

ASIN	B0049RIUWK
ASIN	B0049RIUWK
Allergen Information	Nut Free
Best Sellers Rank	#8,412 in Pet Supplies ( See Top 100 in Pet Supplies ) #55 in Aquarium Filter Accessories
Brand Name	Fluval
Customer Reviews	4.7 4.7 out of 5 stars (8,296)
Date First Available	August 18, 2004
Department	Unisex-Adult
Global Trade Identification Number	00015561113779
Included Components	Fluval Spec/Evo/Flex Activated Carbon, Replacement Aquarium Filter Media, 3-Pack, A1377,Black
Is Discontinued By Manufacturer	No
Item Form	Granules
Item Type Name	Fluval Spec/Evo/Flex Activated Carbon, Replacement Aquarium Filter Media, 3-Pack, A1377,Black
Item Weight	5.82 Ounces
Item model number	A1377
Liquid Volume	34 Liters
Manufacturer	Rolf C. Hagen (USA) Corp.
Manufacturer	Rolf C. Hagen (USA) Corp.
Manufacturer Part Number	A1377
Model Number	A1377
Pet Type	Fish
Product Dimensions	12 x 4 x 7 inches; 5.82 ounces
Target Species	Fish
UPC	015561113779
Unit Count	3 Count
Warranty Description	Warranty

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€ 11.29

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In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Italy.

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