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

Product ID: 2119070

Details

Brand
Fluval
Item Form
Granules
Item Weight
5.92 ounces
Liquid Volume
34 liters
Number of Packs
3

✨Creates crystal clear, sparkling water

💧Removes heavy metals & pollutants

⚗️Research-grade carbon for max adsorption

RM103

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Description

✨ Elevate your aquarium’s clarity game—because your fish deserve the best! 💧

MAXIMIZED SURFACE AREA - Research-grade activated carbon with vast surface area for superior impurity absorption
TAILORED FIT FOR FLUVAL - Specifically engineered for Spec, Evo & Flex aquarium series—perfect compatibility guaranteed
TRIPLE PACK CONVENIENCE - Three replacement inserts ensure uninterrupted, long-lasting filtration
TRUSTED AQUATIC INNOVATION - From Fluval, pioneers of 3-stage filtration technology since 1975, ensuring cutting-edge quality
PREMIUM CHEMICAL FILTRATION - Eliminates odors, discolorations & harmful metals for pristine water clarity

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 effectively removes heavy metals, odors, discolorations, and pollutants, delivering crystal clear, sparkling water. Trusted by aquarists worldwide, it leverages Fluval’s decades-long innovation legacy to maintain optimal aquatic health and visual brilliance.

Specifications

ASIN	B0049RIUWK
ASIN	B0049RIUWK
Allergen Information	Nut Free
Best Sellers Rank	#7,033 in Pet Supplies ( See Top 100 in Pet Supplies ) #35 in Aquarium Filter Accessories
Brand Name	Fluval
Customer Reviews	4.7 4.7 out of 5 stars (8,349)
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
Item Form	Granules
Item Type Name	Fluval Spec/Evo/Flex Activated Carbon, Replacement Aquarium Filter Media, 3-Pack, A1377,Black
Item Weight	5.92 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
Number of Items	3
Number of Packs	3
Pet Type	Fish
Product Dimensions	2.8 x 3.3 x 4 inches; 5.92 ounces
Target Species	Fish
UPC	015561113779
Unit Count	3 Count
Warranty Description	Warranty

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RM103

Duties & taxes included

In stock

Sold byAmazon MalaysiaDelivered 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 Malaysia.

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TrustScore 4.5 | 7,300+ reviews

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