Mars Hydro 4" iFresh Carbon Filter.

Small, unassuming… and absolutely ruthless on smells. 

• Premium Australian Activated Carbon
• Refillable Design
• 210 CFM Airflow Rating
• Free & Fast UK Delivery
• Heavy Duty Steel Construction
• Machine Washable Pre-Filter
• Ultra Efficient Odour Removal
• Lightweight & Compact Form
• Perfect Match for iFresh Systems
• Pay As You Grow with Klarna

Mars Hydro iFresh Carbon Filter.

Let’s talk about smells.

Not the pleasant sort. Not freshly cut grass or a Sunday roast. I mean the kind of smell that creeps under doors, lingers in hallways, and makes visitors raise an eyebrow before they’ve even taken their coat off.

If you’re running a Grow Tent, you’ll know exactly what I’m on about.

And this… this is where the Mars Hydro iFresh 4" Carbon Filter steps in, rolls up its sleeves, and gets to work like a highly trained air-cleaning assassin.

Australian Carbon Bed.

At the core of the Mars Hydro iFresh filter is imported 1050+ grade Australian activated carbon. Now, that might sound like marketing fluff, but it isn’t.

This stuff is the business.

We’re talking about carbon with an enormous internal surface area, packed with microscopic pores that trap odour particles and volatile organic compounds like a black hole traps light. Once it’s in there, it’s not coming back out.

The result is 100% filtered airflow. Not “mostly clean.” Not “improved.” Properly scrubbed, neutral air that leaves your Grow Tent without announcing its presence to the entire building.

It doesn’t mask smells. It eliminates them. Completely.

Compact Size. Complete Control.

Now, at first glance, the Mars Hydro iFresh 4" Carbon Filter looks rather modest.

A 4-inch flange, a 12-inch body, and a lightweight construction that won’t have your grow tent frame crying for help. But don’t let that fool you.

With an airflow rating of 210 CFM, it’s perfectly matched to 4-inch inline systems, particularly the Mars Hydro iFresh range. It handles the airflow without choking, without restricting performance, and without compromising filtration.

In other words, it’s been designed properly. Not guessed. Not cobbled together. Engineered to work in harmony with your setup.

And when everything works together, everything works better.

Built To Mean Business.

There’s a reassuring solidity to the Mars Hydro iFresh filter.

The outer shell is constructed from aluminium flanges and dual-sided galvanised steel mesh, giving it both strength and durability. It doesn’t flex, it doesn’t rattle, and it doesn’t feel like it might disintegrate after a few weeks of use.

Inside, the carbon bed is tightly packed to maximise contact time between air and carbon, which is exactly what you want if you’re serious about odour control.

And then there’s the pre-filter.

A simple thing, really. A fabric sleeve that wraps around the outside. But it plays a crucial role, catching dust, debris, and airborne particles before they can clog up the carbon.

It’s machine washable, easy to maintain, and extends the lifespan of the filter significantly. Which means less hassle, fewer replacements, and better long-term performance.

Flexible. Practical. Clever 

The Mars Hydro iFresh 4" Carbon Filter isn’t fussy about how you use it.

It can be configured as part of an intake system, pulling clean air into your Grow Tent, or as an exhaust filter, scrubbing outgoing air before it leaves your space. Either way, it does its job with quiet efficiency.

Pair it with a Mars Hydro iFresh inline fan, and you’ve got a fully integrated system that handles airflow and odour in one seamless operation.

It’s the kind of setup that makes you wonder why anyone would bother with anything else.

Maintenance Without The Headache.

Now, nothing lasts forever. Not even excellent carbon filters.

Mars Hydro recommends replacing the carbon after around three months of continuous use to maintain peak performance. But thanks to the refillable design, you’re not throwing the whole unit away.

You simply refresh the carbon, clean the pre-filter, and carry on.

It’s practical. Sensible. And far less wasteful than sealed, disposable units.

No Drama. Just Clean Air.

What I like about the Mars Hydro iFresh 4" Carbon Filter is that it doesn’t try to be clever for the sake of it.

There are no gimmicks here. No unnecessary features. Just a well-built, properly engineered filter that does exactly what it’s supposed to do.

It removes odours. Efficiently. Consistently. Without fuss.

Which, when you think about it, is exactly what you want.

Mars Hydro iFresh 4” Carbon Filter Specs:

Flange Size: 4 inch
Filter Length: 12 inch
Airflow Rating: 210 CFM
Carbon Type: 1050+ Virgin Australian Activated Carbon
Construction: Aluminium Flanges with Dual-Sided Steel Mesh
Pre-Filter: Machine Washable Sleeve Included
Design: Refillable Carbon System
Application: Intake or Exhaust Filtration

Because in a Grow Tent, what people don’t smell… matters just as much as what your plants get to breathe.