Important Safety Notice:
The use of molecular hydrogen in closed aquatic systems is still an emerging area of study. Copexa systems are designed as tools for those interested in exploring this technology in controlled aquarium environments.

Molecular hydrogen (H₂) is flammable. Active cross-ventilation is required at all times. Copexa systems are not intended for use in fully enclosed, unventilated spaces such as upper aquarium canopies, hoods, cabinets, stands, or sump enclosures.

All use is at your own risk. Please review our Terms of Service and Scientific, Safety & Product Disclaimer for full safety guidelines and terms.