GNC Marine is the sole trademark owner, primary formulator, and direct manufacturer of GNC Marine biological water treatment products, including STP Solupak, LA 20NC, GT Super, Microclean, ARC 360, and GWP Super.

GNC Marine Global operates as our exclusive global headquarters for direct customer support, technical compliance, and order fulfillment. Third-party directories or unauthorized websites listing GNC Marine products do not hold direct supply agreements and may present outdated technical data or unverified product versions.

For authentic products, direct manufacturer support, and current Safety Data Sheets (SDS), always procure directly via gnc@gncmarine.com or +45 88441716.