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,

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4 Inch Carbon Filter, Inline Air Filter Odor Control with Australian Virgin Charcoal, Carbon Filter for Inline Fan, Grow Tent, Hydroponics, Pre-Filter Included, Reversible Flange

Product ID: 527019020

Details

Brand
MARS HYDRO
Compatible devices
IRobot Roomba
Item weight
6 Pounds
Material
Activated
Number of Items
2

🌀4-inch diameter for optimal airflow

🌿1050+ Virgin Australian activated charcoal

🔄Reversible flange for versatile installation

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46.66 OMR

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Description

🌬️ Elevate your air game — breathe fresher, grow stronger!

BUILT TO LAST - Durable aluminum and steel construction designed for professional-grade performance
DUAL MODE FLEXIBILITY - Use as intake or exhaust filter to maximize your grow tent’s air quality
PLUG PLAY SIMPLICITY - Includes pre-filter for extended carbon life and easy maintenance
NEXT LEVEL ODOR CONTROL - Effortlessly neutralizes odors from grow rooms, pets, smoke, and more
PURE AIR ZERO COMPROMISE - 100% filtered airflow with premium activated carbon for unmatched odor elimination

The MARS HYDRO 4 Inch Carbon Filter features premium 1050+ Virgin Australian activated charcoal for superior odor absorption and 100% filtered airflow. Designed for grow tents, hydroponics, and indoor spaces, it offers reversible flange installation and includes a pre-filter for enhanced durability and maintenance ease. Engineered with aluminum and steel, this filter ensures professional-grade air purification and odor control.

Specifications

ASIN	B09QBS8NLG
Brand Name	MARS HYDRO
Common Applications	Residential
Compatible Devices	IRobot Roomba Irritation
Customer Reviews	4.7 4.7 out of 5 stars (123)
Item Weight	2.72 kg
Manufacturer	MARS HYDRO
Material Type	Activated Charcoal, Aluminum, Steel
Model Number	4 carbonfilter
Number of Items	2
Product Grade	new
Unit Count	1.0 Count

Reviews

R**W

Very nice

27.03.2026

A**I

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

5.02.2026

D**P

Erfüllt seinen Zweck.

10.12.2025

S**I

I have this connected to a inline fan on my. 3x3 foot indoor grow tent and absolutely zero smell through the flower stage. Works as it should

21.03.2026

J**S

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

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