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.

ACTI-Mag for wastewater

An innovative and environmentally friendly solution for wastewater treatment.

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ACTI-Mag is one of the safest, most cost-effective and earth-friendly ways to manage many aspects of wastewater treatment:

Odour and H₂S control

Hydrogen sulphide is present due to anaerobic activity, which favours sulfate reducing bacteria (SRB) and results in the generation of a poisonous rotten egg gas called H2S. Unlike other agents, which can be costly, potentially hazardous, and targeted at a single issue, ACTI-Mag offers a safe and cost-effective strategy for managing odour.

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Alkalinity & pH adjustment

ACTI-Mag provides more CaCO3 equivalent alkalinity on an equal weight basis when compared to hydrated lime and caustic soda which lowers chemical consumption. Unlike caustic soda, ACTI-Mag is non-hazardous and non-corrosive, and even beneficial to the environment while sodium is a salinity hazard.

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Caustic soda (sodium hydroxide) replacement

While ACTI-Mag is typically more expensive than 50% NaOH on a “price per unit” basis, it is significantly less expensive in use – because every 1.0 kg of 50% NaOH can be replaced by 0.6 kgs of 60% Mg(OH)2 to provide the same number of moles of hydroxide (OH-) for pH neutralization.

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Fats oils and greases (FOGs) control

Higher concentration of FOG can lead to the formation of fat bergs, scamming, pump blockages, pipe restriction, pipe blockage plus the formation of odour related issues like hydrogen sulfide gas (H2S). ACTI-Mag is a safe and environmentally friendly solution for FOGs in wastewater

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Phosphorus removal

Phosphorus – usually in the form of phosphates – has to be treated and reduced from the wastewater in order to meet environmental standards before it is discharged into a local water body, or land irrigation. With a chemistry similar to the antacids used in our human digestive systems, Calix can safely and cost-effectively remove phosphate from municipal and industrial wastewater.

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BOD/COD reduction

Reducing BOD means that the sewage will support the growth of less bacteria and therefore the effluent will be better able to infiltrate tight soils. We can help you reduce the organic component from your wastewater streams.

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Active Monitoring Services

Calix has developed robust, field ready H2S & pH monitoring solutions to allow 24 x 7 performance tracking and sewer network dosing optimization.

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Don’t be so caustic!

Calculate how much you could save by switching to magnesium hydroxide.

use our ACTI-Mag Savings Calculator

Dosing equipment and monitoring services

Our engineered and cost-effective solutions are tailored 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.

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Success stories


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.


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