I'm 6 years in this hobby. And I found out this now. Maybe I'm not too bright
I never read anything about this, but it makes sens. I have 125 reef plus 30 gal
sump. No covers I have 1 gal
evaporation every day. Because of this I do not have to use humidifire. In family room where tank is 60% humidity all others 40-50%. When I turned on humidifire it was over 70%. So because all evaporation air in the house is not dry during winter when furnace is runing. Hm..strange but makes sense. Maybe I should put covers ( lids) on. But I heard that is no good because no gas Exchange. What you guys think about it? Thanks.