I decide to share my experience with the humidifier. 
I get this one from Aliexpress, a nice tank with 2,5 liters capacity what can make it fantastic for 3 and even 4 days continuesly in lowest level of fog.
This is also a great function it count, fog volume regulation, from really a lot tight cloud till just a humidity touch.
An option it have but I don't use is the low bright led illumination system, can be use one or more colors, perfect to go creative taking photos or just get a colorful time
, for the rest not much to say, pretty easy to recharge, have a system to keep the water safe inside without effort or accident, it is super quiet machine, I personally love it, I buy another one and I use it at night, ideal for kids and allergic person.Also easy to clean, I use soap, bicarbonate and vinagre, so far working for a year as new.
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