THE HEX CONCEPT

For energy efficient and reliable water filtration and particle removal

The innovative HEX Drum filter, featuring the exclusive HEX High Performance (HP) Filter panel, engineered for exceptional water filtration and particle removal within the 10 to 500 μm range.

With a robust construction and minimal maintenance requirements, the HEX Drum filter ensures exceptional longevity. The patented hexagonal design of the support grid allows the Filter panel to bend without inducing stress on individual strings.

HEX Drum filters are energy-efficient and available in various versions and sizes to meet your specific requirements – explore our product line for more details. These filters have demonstrated outstanding performance in numerous applications, including well boats, sealice barges, RAS plants, and traditional fish farms worldwide.

See References

The HEX Drum filters are reliable and low-maintenance

HEX HP Filter panel secures maximum filtration.

The patented hexagonal shape of the support grid, welded in one operation, allows the Filter panel to bend without placing stress on individual strings. This design enables the use of thinner strings, creating a larger open area compared to other shapes. As a result, our HEX Drum filters deliver higher flow capacity per square meter of filtration area, reducing footprint and investment while maintaining superior fine filtration for your application.

How to easily exchange HEX HP Filter panels
Bee Cell Panel
Resitant materials
No corrosion – built for seawater.

Using corrosion resistant materials; using non-metallic materials for all main components, PE on tank, cover, sludge tray and high-tech polymer drum. Titanium screws/nuts are applied for warm saltwater applications.

See HEX Drum filter X-series
Unique drive system.

The Direct Drive Gear Wheel (DDGW) has all non-metallic wheels and is very robust ensuring no sudden stops. The Gear motor is positioned high and has a 95 % efficiency owing to cone wheels. And there is no need for lubrication or maintenance of the Gear wheel drive.

See Easy Maintenance
Direct Drive Gear Wheel
HEX Drum filter X24 click system
HEX Drum filter X24 click system.

With the new HEX Drum filter X24 click system, exchange of Filter panels is made easy, fast and simple. The one click system works without bolts, nuts or use of tools, and after removal of the holders, the Filter panel can be exchanged in a fast and fail proof manner.

See Easy Maintenance
HEX | Drum filter X24-series
HEX | Drum filter X24-series

Corrosion free. All high-tech polymers perfect in salt water and tropical salt water

HEX | Drum filter F-series
HEX | Drum filter F-series

Standard HEX, very robust and improved continuously

HEX | Drum filter Model SHIP
HEX | Drum filter Model SHIP

Build to operate in rough sea with waterproof drive and open access for disinfection

HEX | Drum filter Model SANI
HEX | Drum filter Model SANI

Specialized for easy disinfection with ultra fast drain and full access tank version

Do you want to learn more about The HEX concept?
CM Aqua Recirculated Aquaculture Systems

Learn more by reading our whitepaper about the importance of fine particle control in recirculated aquaculture

Frequently asked questions about HEX | Drum filters

A drum filter is a mechanical filtration unit that removes solid particles from water using a rotating drum covered with a fine mesh screen. As water flows through the mesh, solids are trapped and automatically washed out.

Installation time depends on system size, plumbing, and site preparation. Most systems can be installed within 1-3 days.

Water enters the drum from the inside. Clean water passes through the mesh while solids stay on the surface. When the mesh becomes clogged, the drum rotates and high-pressure nozzles rinse out the solids into a waste trough.

Yes. We offer customized mesh screens, inlets, outlets, and control options to match unique project requirements.

Drum filters are widely used in aquaculture farms, public aquariums and wastewater treatment.

Yes. Our team offers remote support, on-site commissioning, and long-term service for all drum filter models.

  • Highly efficient solid removal
  • Low operating costs
  • Automatic cleaning
  • Continuous water flow
  • Long service life with minimal maintenance

Our drum filters are available in multiple sizes and configurations, including compact units for small research facilities, mid-range models for RAS farms and aquarium LSS, and large-scale industrial versions for the biggest installations. Options include different mesh sizes, stainless steel or HDPE construction, and freshwater or seawater configurations. The HEX | Drum filter comes in three different versions, the open channel-installed, the half-tank with piped or open inlet and a fully enclosed tank version.

Drum filters are mostly self-cleaning. Regular maintenance includes checking nozzles, seals, and bearings, as well as occasional screen replacement depending on usage.

Standard mesh sizes range from 10 to 150 microns with polyester mesh and 25 to 500 microns with stainless-steel mesh, depending on solids load and filtration goals.

HEX | Drum filters are built from corrosion-resistant stainless steel, as our F-series or polymer composites, as our X24-series – both are designed for long-term durability in aquatic environments.

HEX | Drum filters are self-cleaning, but routine inspection is recommended. In most cases:

  • Visual checks weekly
  • Nozzle and seal inspection every 1–3 months
  • Bearing and drive system check every 6–12 months
  • Screen panel replacement depending on wear, typically every 1–3 years

Actual frequency depends on solids load, water quality, and filter size.

Absolutely. Drum filters are a core component of RAS for maintaining water clarity, protecting biofilters, and improving overall system performance.

Proper sizing is based on:

  • Water flow rate (m³/h)
  • Total suspended solids (TSS)
  • Mesh opening size (microns)
  • Required hydraulic loading rate
  • Species and production density
  • Freshwater vs. seawater application

Choosing the right model ensures stable filtration performance and protects downstream components like biofilters.

Typical costs include electricity for the motor and pump, water for rinsing, and periodic parts replacement. HEX | Drum filters are known for low total cost of ownership.

Frequently asked questions about HEX | Drum filters

Yes. We offer customized mesh screens, inlets, outlets, and control options to match unique project requirements.

A drum filter is a mechanical filtration unit that removes solid particles from water using a rotating drum covered with a fine mesh screen. As water flows through the mesh, solids are trapped and automatically washed out.

Installation time depends on system size, plumbing, and site preparation. Most systems can be installed within 1-3 days.

Water enters the drum from the inside. Clean water passes through the mesh while solids stay on the surface. When the mesh becomes clogged, the drum rotates and high-pressure nozzles rinse out the solids into a waste trough.

Drum filters are widely used in aquaculture farms, public aquariums and wastewater treatment.

Yes. Our team offers remote support, on-site commissioning, and long-term service for all drum filter models.

  • Highly efficient solid removal
  • Low operating costs
  • Automatic cleaning
  • Continuous water flow
  • Long service life with minimal maintenance

Our drum filters are available in multiple sizes and configurations, including compact units for small research facilities, mid-range models for RAS farms and aquarium LSS, and large-scale industrial versions for the biggest installations. Options include different mesh sizes, stainless steel or HDPE construction, and freshwater or seawater configurations. The HEX | Drum filter comes in three different versions, the open channel-installed, the half-tank with piped or open inlet and a fully enclosed tank version.

Drum filters are mostly self-cleaning. Regular maintenance includes checking nozzles, seals, and bearings, as well as occasional screen replacement depending on usage.

Standard mesh sizes range from 10 to 150 microns with polyester mesh and 25 to 500 microns with stainless-steel mesh, depending on solids load and filtration goals.

HEX | Drum filters are built from corrosion-resistant stainless steel, as our F-series or polymer composites, as our X24-series – both are designed for long-term durability in aquatic environments.

HEX | Drum filters are self-cleaning, but routine inspection is recommended. In most cases:

  • Visual checks weekly
  • Nozzle and seal inspection every 1–3 months
  • Bearing and drive system check every 6–12 months
  • Screen panel replacement depending on wear, typically every 1–3 years

Actual frequency depends on solids load, water quality, and filter size.

Absolutely. Drum filters are a core component of RAS for maintaining water clarity, protecting biofilters, and improving overall system performance.

Proper sizing is based on:

  • Water flow rate (m³/h)
  • Total suspended solids (TSS)
  • Mesh opening size (microns)
  • Required hydraulic loading rate
  • Species and production density
  • Freshwater vs. seawater application

Choosing the right model ensures stable filtration performance and protects downstream components like biofilters.

Typical costs include electricity for the motor and pump, water for rinsing, and periodic parts replacement. HEX Drum filters are known for low total cost of ownership.

For more information get in contact

Kurt Carlsen

Kurt Carlsen, 
Sales Director & Founder
+45 2117 5600
kc@cmaqua.dk