Calix Water Business in North America is IER (

IER offers Magnesium Hydroxide-based products as safe, earth-friendly alternatives to the use of caustic soda for pH neutralization, along with proprietary polymer solids removal technologies.

Chemical dosing units

Chemical dosing in wastewater treatment is the controlled delivery of chemicals into the process stream either to adjust and maintain the pH, reduce hydrogen sulphide odours, prevent corrosion of sewer assets, or remove undesirable elements such as phosphorous or fats oils and grease.

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  • Are you paying too much for your MHL dosing units?
  • Need to reduce odours without significant capital expenditures?
  • Need a system that is compatible with your SCADA systems?
  • Tired of flushing your IBCs?
  • Need a solution tailored to your specific site requirements?

We can help you review and optimise your wastewater process to make sure your system is running smoothly and cost effectively.

Calix leverages a culture of innovation to provide fully customised services such as design, engineering, installation, piping and commissioning services to provide turnkey systems for chemical dosing.

  • Engineered by us – our cost-effective solutions are designed to meet your specific needs and budget.
  • Quick to install – our modular dosing units can be delivered on site by truck and are fast to set up and connect.
Download the Solution Spec Sheet

Key Benefits

Attractive cost savings
Eliminate odour complaints
Safe and non-hazardous
Optimise your budget
Corrosion free
Australian manufactured

Our engineered and cost-effective solutions are tailored to meet your specific needs and budget.

The standard dosing can be deployed in optional configurations as required by specific sites. Where the units will be deployed in a public space or a site with low security, the system can be fitted with external cladding to prevent damage due to vandalism. Where the system is exposed to extreme hot or cold temperatures as is common with remote sites, the systems can come fitted in an insulated panel.

ACTI-Mag is not categorised as a dangerous chemical and in most jurisdictions does not require bunding. However to reduce the impact of any spills customers can opt to have the unit in a fully bunded enclosure.



A single dosing skid with a capacity of 1,500 or 2,000 litres. Comes in 3 different options of secondary containment; no bund, drip tray (~300 litres) or fully bunded.

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Self contained design for a self-bunded unit, with capacities up to 4,000 litres. Secure, vandal proof, weatherproof, easy to pick and place.

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Same running equipment as the Calix dosing system – Flex, but without the tank. This model can be hooked up to any size – which makes it suitable for customers with different size tanks.

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These have large external tank from 5,000 to 12,500 litres in a single tank. Valuable pumps, sensors and controls, stored securely inside a container.

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Compact, reliable and innovative

Calix’s standard dosing system is a compact, reliable and innovative system based on years of experience with Magnesium Hydroxide Liquid. The system includes a 2000L conical tank, a peristaltic pump capable of dosing up to 70L of ACTI-Mag per hour, an external recirculation pump to keep the product homogeneous and a water flush line to keep the dosing line clear and reduce build-up. The system can operate in a variety of control modes based on the customers requirements.

These include dosing when the pump station is running, dosing based on daily schedule or continuously varying its dose rate based on inputs from the customers sites. The varying options allow the system to dose the optimal amount of ACTI-Mag for your needs. The standard dosing system is suitable for sites that do not require bunding or additional security. The systems can be easily loaded and unloaded with a forklift.

Lease or buy?

We are here to help you review and optimise your wastewater process, and this comes with weighing up the options and assessing what’s right for you.

Our nationwide coverage through an established network of local distributors and partners means hassle free delivery, excellent and local customer service and support wherever you are located*.

*note: Services may vary from time to time subject to location, and services provided by the associated distributor.
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Custom-engineered containerised dosing systems for larger sites

For larger sites that require additional storage capacity, security or flexibility Calix can provide fully containerised dosing systems. These systems can be based on our standard layout and format or can be custom engineered to your requirements. Storage sizes can range from 600L – 6000L in a fully bunded system. For sites that have an external bund external tanks up to 12,500L can be used. Multiple tanks can used to achieve the capacity requirements of the customers site.

related customer stories

We recommend using ACTI-Mag in our units.

Calix ACTI-Mag lowers chemical consumption and ensures easier use, handling and storage, thus considerably reducing costs. ACTI-Mag offers the following benefits:

  • Odour control
  • pH adjustment and alkalinity boost
  • Fats, oils and greases control
  • Phosphate removal
  • Biochemical & Chemical Oxygen Demand reduction
  • Biogas management
Find out more about ACTI-Mag for wastewater

Standard connection requirements

The unit can be integrated into the customers SCADA network through a MODBUS TCP connection directly into the PLC controller.

The units only require a 10amp GPO, and come with a 15m fly lead attached as standard.

A water supply with an installed RPZ Valve with a minimum pressure of 6 bar is required for water flushing.

Got a wastewater challenge?

Our values guide us through every step of the work process, every collaboration we undertake and every challenge we approach:

Inclusion • Positive impact • Continuous improvement 

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Watch our Webinar: Chemical dosing unit solutions

In this webinar, Calix Business Development Manager Sam Sood and Calix Operations and Sales Engineer Shayne Rettke will discuss how Calix has leveraged a culture of innovation to provide fully customised services such as design expertise, engineering know-how, detailed engineering, installation & commissioning services to provide turnkey systems for chemical dosing.

More webinars

The Calix difference

People, unique technology, partners, and track record

Leading edge technology

Calix core technology makes high surface area materials (with a honeycomb-like structure), giving you a price and a reactivity advantage.

Our materials are proving to have similar properties to highly active nano-materials, without the health/safety concerns and high cost, but with all the benefits.

Faster reactivity = less costs

Manufactured in Australia

Fully integrated supply chain – from mine to customer

Calix is able to offer better service, reliability and performance to its
customers because it controls the entire production process from mining
of raw materials, processing and production.

We work together in ways others don’t, considering the long-term effect of our actions, never satisfied with the status quo.

Calix has its own direct delivery, service and support capabilities and also has an established a network of local distributors and partners that can provide the best solution for your specific needs and ensure you receive excellent customer service and support, wherever you are located.

Got a question? Want a quote?


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Calix supports WaterAid programs to facilitate access to safe water, sanitation and hygiene in the world’s poorest and most marginalised communities.

This partnership with WaterAid aligns perfectly with our purpose and the reason to why we exist “We Solve Global Challenges” and with our core value of “positive impact”.

Looking for a safety data sheet (formerly known as MSDS)?