Description
ONA Liquid 922ml Professional is the concentrated liquid formulation of ONA (Odour Neutralising Agent) in the Professional fragrance — a clean, neutral scent that provides powerful odour elimination when used in ONA Pro misting systems, spray applications, and the ONA misting dome. We have been recommending ONA Professional liquid to UK growers since 2017 as the workhorse of serious grow room odour management — it is the format that delivers ONA’s proven neutralising chemistry in the highest concentration and largest volume for the most demanding odour control applications.
How ONA Professional Liquid Achieves Comprehensive Odour Elimination
ONA Professional Liquid uses the same active chemistry as the full ONA range — plant-derived essential oils and active neutralising compounds that chemically react with and eliminate organic volatile molecules rather than covering them with a stronger fragrance. The liquid format allows it to be atomised into an extremely fine mist by ONA’s compatible misting systems, distributing the active ONA agent as microscopic droplets that remain suspended in the air and maximise contact with the odour compounds in the treated space. The Professional fragrance is specifically formulated to be as neutral and unobtrusive as possible while still delivering effective neutralisation — making it the right choice for applications where a strong fragrance in the treated area would itself be undesirable. At 922ml, the Professional bottle provides a generous supply for misting system use, where the reservoir is refilled regularly as the liquid is consumed during operation.
How to Use ONA Liquid Professional
Pour ONA Professional Liquid into the reservoir of your ONA Pro misting system or ONA misting dome. Programme the misting system for your desired operation schedule — typically short bursts at regular intervals rather than continuous misting for efficient use of the liquid. For spray application, dilute at 1 part ONA to 4 parts water in a clean spray bottle and apply to areas requiring odour treatment. Do not place ONA liquid or misting systems directly inside the active growing space where the scent could be absorbed by the crop. Shake the bottle before each use to ensure any settled compounds are fully suspended.
Pair ONA Liquid Professional with the ONA Pro Misting System, ONA Air Filter, and OCD Cubes for a comprehensive, multi-layer odour management programme. Browse our full ONA range for all fragrances and formats.




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