I use ONA and think it is the only "air freshener" type product of any value in controlling mj odor
you can buy it as a jell or liquid....the jell is actually those little moisture holder particles you add to potting soil...when the jell gets low just add more ONA liquid
I have tried some many other products it's rediculous...also check out the classic build your own odor elimination machine (using ONA)
Build your own Odor Neutralizing Machine
I use it for leaks not my main odor control...but it does work!!!!
a warning....ONA fumes run though your filter will shorten the live of your carbon if you use it in combination....and it will effect (though some do not mind or notice much) the scent of your mj
that is why I use it outside the growroom or closet.