your humidity should be between 30-50 % I don't believe it would be the end of the world at 25% but I could be wrong. instead of a humidifier you could use a shallow pan with a little water with a heat mat under it. depending on the size of your room.
Rubberbubbler Reviewed by Rubberbubbler on . Extremely Low humidity... is this bad?! OK, so I think I have everything dialed in except humidity. It looks like humidity is pretty constant at around 25% in my room. I know this isn't ideal, but is this going to drastically impact growth rate?? I really don't want to add a humidifier in there so if effects are negligible I'm going to just not worry about it. I understand this low humidity will be good during flower... Rating: 5