Cleaning & Maintenance


Treatment to control the build-up


An advanced liquid treatment to control the build-up of floating and settled solids in grey water storage tanks and pipework. This in turn controls malodour and septicity and reduces the frequency of pump outs.

The easy-to-use liquid formulation contains a blend of bacteria selected for their ability to degrade a wide range of organic materials found in grey water. These include fats, oil, greases, protein and starch, soap (and other detergents) and cellulose from toilet paper that arise from all normal galley and accommodation use.

GNC Marine supplies GW20 in 4x5Ltr packaging.

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    Priceless Experience

    Our staff and partners each have more than 25yrs experience in either chemical, biological, biocidal products, cleaning equipment, service provision and global logistics.

    Custom Packages

    We design, manufacture and supply specialized cleaning, maintenance and biosecurity products with proven performance to the marine and offshore industries.


    We have a history of working in partnership with the industry’s key technology providers, distributors and OEM’s. We can deliver products to you in all the key international ports

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