This product has been designed to eradicate odors, such as petrol in the industrial sector. Eventually, it has become a sort of cannonical freshener for fighting cannabis odors.
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Description
ONA Block is a freshener that neutralizers odors without leaving any trace of them. Its special composition is a mixture of essential oils that, when evaporated in the air in the form of molecules, attach themselves to odor molecules. Once both types of molecules are together, their weight increases considerably, which makes them fall to the ground and disappear. This eliminates the problem entirely.
Ona Block is presented in a solid and hard form. To make it work, all you have to do is place it where it is needed, open the lid and allow it to evaporate and act. Efficacy can be boosted by taking it out of the container completely so that it can evaporate faster as it will be fully in contact with the air. Place it near the entrance door of your house, if you are having problems with odors on the stairs or the patio, or outside your drying room door so that the odor does not spread all over your home.
Ona Block is the cheapest and most effective solution if you are growing strains that smell particularly strong like Txomango and cannot be 100% eliminated with carbon filters. You can place it in air extraction ducts so that the air that passes through the filter is fully cleaned. To do this, you should use an adapter for the Ona Tube with a special grid where we can put up to 2 tablets of Ona Block. The out-coming air will be completely free of any marijuana smell and will have a light aroma of your choice: Fresh Linen (citric), Apple Crumble (apple) Pro (neutral) and Polar Crystal (fabric softener). The estimated durability of this product is 4 to 6 weeks, depending on how you use it.
Ona Block volume:
Ona Block fragrances:
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07/01/2026
I can't really give a full review yet, I ordered the Pure and it doesn't smell like anything, I can't really tell if it eliminates odours either, I think so because my house doesn't smell as much like tobacco, but it's too early to know if it's worth it, I'll try another scent
Translated from Spanish
Todavía no puedo opinar del todo, pedí el pure y no huele a nada, tampoco se decir si elimina los olores creo que si porque mi casa no huele tanto a tabaco pero es pronto para saber si merece la pena, probaré con otro aroma
06/05/2025
Eliminates the smells of our little plants very well
Translated from Portuguese
Elimina muito bem os aromas das nossas plantinhas
19/01/2025
A great buy if you have smell problems!
Translated from Portuguese
Uma grande compra se tiver problemas com cheiro!
29/09/2022
Good product, helps a lot when the carbon filter doesn't quite remove the smells (I have a can filter), especially when growing potent strains (right now I have several from compound genetics) and there's no way with just the carbon filter, the thing is that by placing them at the end of the extraction duct they last me around 2 and a half weeks approximately, I guess it's because the extractor runs 24 hours at good power (iso max 410m3)
Translated from Spanish
Buen producto, ayuda mucho cuando el filtro de carbono no acaba de quitar los olores (yo tengo un can filter), sobre todo cuando se cultivan variedades potentes (ahora estoy con varias de compound genetics) y no hay manera con el filtro de carbono, el tema es que yo al ponerlosal final del tubo de extracción pues me aguantan alrededor de 2 semanas y media aproximadamente, supongo que es porque el extractor está 24 horas con buena potencia (iso max de 410m3)
24/01/2022
What are the differences between Ona block and Ona gel?
Translated from Spanish
¿Que diferencias hay entre el Ona block y el Ona gel?
29/04/2021
Eliminates any smell... I don't need to use a carbon filter, just put the ONA in the air outlet.
Translated from Spanish
Elimina cualquier olor... no necesito usar filtro de carbón, solo colocar el ONA en la salida de aire.
08/04/2021
Good camouflage, has a super strong scent but it's very pleasant. You can't smell the ladies at all. I cover and uncover it as needed.
Translated from Spanish
Buen camuflaje, tiene un olor súper potente pero
es muy agradable. No se nota nada el de las ladys. Lo voy tapando y destapando según necesito.
01/04/2021
Masks smells of any kind very well
Translated from Spanish
Camufla muy bien los olores de cualquier tipo
24/02/2021
Very good ONA Block.
Translated from Spanish
Muy buen ONA Block.
14/02/2021
Great, also arrived in one day and with lots of freebies!! You guys are awesome
Translated from Spanish
Estupendo, ademas llegó en un dia y con un monton de regalos!! Sois geniales
11/02/2021
Well for 11 euros it neutralises smells pretty well, can't really ask for more. Been using them for a few years now and paired with good extraction you don't need much else (average user level of course xD)
Translated from Spanish
Pues por 11 euros neutraliza los olores bastante bien, poco más se le puede pedir. Llevo ya unos años utilizándolos y junto a una buena extracción no necesitas mucho más (nivel usuario medio claro xD)
09/02/2021
Works well