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ONA Odor Neutralizer

ONA Odor Neutralizer.

ONA gel is a proven and powerful solution for odor control in indoor grow environments. Designed to neutralize odors instead of masking them, this gel is the ideal choice for growers who value efficiency and safety.

Long-lasting effect: evaporates gradually over several weeks.
Safe for plants, people and pets: no harsh chemicals.
Broad-spectrum action: tackles both organic and non-organic odor sources.
Available in multiple sizes and scents (PRO, Tropics, Polar Crystal).
Compatible with ventilation dispensers such as the ONA Breeze.

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Ona Block Polar Cristal 170 g

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Ona Block Fresh Linen 170 g

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Ona Block Pro 170 g

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Ona Block Apple Crumble 170 g

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Ona Block Fruit Fusion 170 g

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Pipe for Ona Block 125 mm

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Pipe for Ona Block 160 mm

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Applications:

Grow tents and indoor grow rooms.
Storage areas.
Spaces with limited ventilation where odors accumulate.
After plant handling such as pruning or harvesting.
Combined with carbon filters for enhanced odor control.

Explore the ONA gel range in our shop and select the size and scent that fit your grow space.Why choose ONA gel for odor control.

ONA gel has become a trusted name in hydroponics and indoor gardening for effective odor management. Unlike air fresheners that simply cover smells with fragrance, ONA works at the molecular level. Its technology combines absorption, adsorption and a scientific “pairing” theory to permanently neutralize odor molecules.

Originally developed for industrial use — wastewater treatment plants and chemical facilities — ONA gel is now widely adopted by hobby and professional growers. It comes in a variety of scents (PRO, Polar Crystal, Tropics, Lemongrass …) and sizes (from small jars to 3.8 kg pails), offering tailored solutions for different spaces and odor intensities.

From a price quality perspective, ONA gel is highly cost-effective. A single container can remain active for weeks depending on temperature and airflow. Its ingredients are safe, often food or cosmetic grade, and it releases no toxic fumes.

Tips for using ONA gel.

Place the jar with lid open in a stable spot, away from direct plant material or airflow ducts.
For faster diffusion, divide the gel into smaller containers or use an ONA Breeze dispenser.
Stir the gel occasionally to ensure even evaporation.
Monitor room temperature: higher heat speeds up evaporation, cooler conditions extend lifespan.
Combine with carbon filters or ventilation for maximum odor control.

Frequently asked questions.

Is ONA gel safe for my plants ?

Yes, it is generally safe. The formula does not release harmful substances, though experienced growers recommend placing it at some distance to avoid any influence on plant aromas.

How long does one jar of ONA gel last ?

Depending on size and conditions, a 3.8 kg pail can remain effective for 4–6 weeks.

Should I use ONA gel together with carbon filters ?

While ONA gel is strong on its own, many growers combine it with carbon filters for maximum odor control. This layered approach ensures reliable performance even under high light intensity or warm conditions.

In summary, ONA gel is a smart investment for any indoor grower seeking a safe, efficient and lasting odor solution. Discover our full range and choose the variant that best suits your grow environment.