Non-Oxidizing Biocide: Controls Algae, Bacteria, Fungi, and Legionella

Algae, bacteria and fungi fouling your system? If left unchecked, slimes may form which can reduce heat transfer efficiency, restrict flow, cause corrosion, wood rot and create potential health and safety issues.

AQUAGUARD 630 is a fast acting, effective broad spectrum biocide that can be used at low levels to control algae, bacteria and fungi.

AQUAGUARD 630 is a highly effective polymeric cationic biocide. Unlike other cationic biocides, it is non-foaming, tolerant of elevated temperatures and suitable for both acidic and alkaline systems. AQUAGUARD 630 functions by penetrating the outer cell wall causing the membrane to leak resulting in cell death. Its affinity for organic (cells) and inorganic surfaces such as pipe walls as well as its detergent properties also make it effective for preventing and eliminating biofilm.

AQUAGUARD 630 exhibits a high degree of stability, is unaffected by pH and elevated temperatures, and delivers a potent long lasting biocidal effect. Where application of an oxidizing biocide is also desired, AQUAGUARD 630 provides a functional synergism thus enhancing the performance of the biocide program.


  • Effective, broad spectrum antimicrobial agent (biocide)
  • Economical—complete control of algae, bacteria and fungi at low dosages
  • More effective than standard quaternary ammonium compounds (quats)
  • Detergency properties make it effective for removing and preventing the formation of biofilm
  • Non-oxidizing and formaldehyde free
  • Non-foaming biocide
  • Effective over a wide pH range and at elevated temperatures
  • User friendly. Low oral and dermal toxicity.


AQUAGUARD 630 is registered for use with the Pest Management Regulatory Agency (PMRA) for use in cooling towers, industrial air washing systems and cutting fluids. Refer to the label for a complete list of uses and directions.

Click here to view the full product label.

Here’s What a Guardian Chemicals
Partnership Looks Like
Step 1
Get in Touch speech bubble icon
Get in touch

Our experts know your industry and will seek to understand the unique challenges of your business. Let’s talk.

Step 2
Truck icon
We come to you

Your systems and processes are interconnected. We’ll arrange a site visit to understand the bigger picture.

Step 3
Lab test tube icon
We propose a solution
A solution is more than just a product—it is a complete program that results in lower life cycle operating cost and considers the impact on health, safety and the environment.
Step 4
Delivery box icon
We deliver fast
Our service is key to your success. We deliver with industry-leading turnaround times, and effective commissioning and training ensure that your system operates safely and effectively from day one.
Ready to Experience the Difference Guardian Chemicals Can Make?

Talk to our team for advice, quotes, and purchasing.

Contact us headphone icon
Contact an industry expert: