What are the actual dimensions of the 6" filter?

Hi, Thanks for your concern. Below is the size information for MARS HYDRO 6 inch carbon filter: Opening: 6", Length: 8.27" Hope this can help you. Thanks

How often do you recommend replacing this filter?

I would just go with a 6 inch carbon filter that way it pulls out more air if a 6-in can fit than a 4 in and if you get the 6 in replace it maybe once a year depending on how much you use it and how hard you're running it

Does this 4 inch filter hook up to a 4” duct ?

Hello, Thanks for contacting us. Yes, you can use the MARS HYDRO 4 inch carbon filter with 4 inch ducting and inline fans. Hope this helps you, please feel free to contact us with any questions. Best Wishes,

Mars Hydro 4 Inch Carbon Filter And Pre Filter Inline

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

🌿 Breathe Clean, Grow Bold — The Ultimate Carbon Filter for the Modern Grower

COMPACT POWERHOUSE - Sleek 4" flange x 12" length design delivers powerful 210 CFM airflow without sacrificing space or style.
ODOR CONTROL MASTERY - Effortlessly neutralizes odors from grow tents, pets, smoke, and chemicals—keeping your space fresh and professional.
BUILT TO LAST CLEAN - Heavy-duty aluminum and galvanized steel mesh frame with a reusable, machine washable pre-filter cloth for long-term performance.
DUAL MODE VERSATILITY - Seamlessly pairs with 4-inch inline fans for both intake and exhaust setups, adapting to your unique grow environment.
PURE AIR ZERO COMPROMISE - Premium 1050+ Virgin Australian activated charcoal ensures 100% filtered airflow for unmatched odor elimination.

The MARS HYDRO 4 Inch Carbon Filter & Pre-Filter combines premium 1050+ Virgin Australian activated charcoal with a durable aluminum and steel frame to deliver 210 CFM of fully filtered airflow. Designed for grow tents and indoor environments, it effectively eliminates odors from plants, pets, and smoke. Its machine washable pre-filter cloth extends filter life, while compatibility with 4-inch inline fans offers flexible intake or exhaust configurations. Perfect for professionals seeking clean air and odor control in compact spaces.

Specifications

ASIN	B09QBS8NLG
Best Sellers Rank	#1,066,438 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #7,630 in Water Purifier Accessories
Brand	MARS HYDRO
Brand Name	MARS HYDRO
Compatible Devices	Air Cleaner
Customer Reviews	4.6 out of 5 stars 136 Reviews
Item Weight	6 Pounds
Manufacturer	MARS HYDRO
Manufacturer Part Number	4 inch carbonfilter
Material	Activated Charcoal, Aluminum , Steel
Material Type	Activated Charcoal, Aluminum, Steel
Model Number	4 carbonfilter
Number of Items	2
Product Grade	new
Unit Count	1.0 Count

Reviews

A**I

Good purchase

Was a bit sceptical before buying it but was delivered before promised time and original item

5.02.2026

D**P

Gute Qualität

Erfüllt seinen Zweck.

10.12.2025

J**S

Great for 3d printers

Got his after getting a centauri Carbon 3d printer and reading about possible micro plastics and VOC's in the air , read having a window open wasn't sufficient, so for my peace of mind got this. Seems to be working , hard to tell. Can't smell the machine now so must be doing something

1.04.2026

A**R

No smells

I've used the competition to this in the past..but this is every bit as good as SF.no smell and working well. Ill buy again.

2.04.2026

J**L

Clean air

I purchased this to scrub there out take air from my grow tent! The scrubber does a great job! I’m only a month in so we will see how long it holds up for

29.04.2024

S**E

Perfect

18.02.2026

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TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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2 days ago

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TrustScore 4.5 | 7,300+ reviews

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Best international shipping I've ever tried. Worth every penny!

3 days ago

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The delivery time was excellent, and the packaging was secure.

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