Description
ONA Gel is the industry-standard odour neutraliser used by indoor growers, commercial facilities, and waste management operations worldwide to eliminate strong, persistent odours from enclosed spaces. Unlike air fresheners that simply mask odours by adding a competing scent, ONA Gel works through a genuine chemical mechanism — the active ingredients in ONA react with odour-causing molecules in the air, neutralising them at a molecular level and permanently removing them from the environment rather than covering them temporarily.
How ONA Gel Works
ONA’s active compounds are a proprietary blend of natural monoterpenes — molecules found in the essential oils of many plants. These compounds react with the volatile organic compounds (VOCs) that cause odours, bonding with them and rendering them non-odorous. This is a fundamentally different process to air fresheners or scented gels that simply introduce a stronger competing smell. ONA removes the offending molecules rather than covering them. The gel format releases ONA’s active compounds slowly and continuously at room temperature, providing sustained odour control without any power source, timer, or maintenance. As the gel evaporates, the active compounds are continuously released into the air space of the room. The gel will last for several weeks to months depending on the size of the container, the ambient temperature, and the size of the space being treated. At The Horticulture Company, ONA Gel is one of our best-selling environmental management products. It is used by growers at every scale as a reliable, passive odour control measure for growing rooms, storage areas, and general facility management.
Correct Use and Important Limitations
Position ONA Gel at the entrance to the odour source — not inside the growing space itself during active plant growth. The monoterpenes in ONA can affect terpene profiles in sensitive plants if used in close proximity. Use outside tent or room doorways, in corridors, or in the surrounding environment to neutralise odours that escape the primary growing space. Multiple smaller containers are more effective than one large container for even distribution across a treated area.







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