Measuring humidity (rack system)

Those of you that use racks (multiple racks) I was wondering what you do for measuring humidity? Do you install and accu-rite in each and every tub? Do you just monitor room humidty? Thanks in advance.

I just use a hygrometer in one tub in each rack. Racks hold humidity pretty well though - you usually don't have to worry. I just keep an eye on how they shed. As long as they shed in one piece than I don't worry about it. I spray every couple of days anyhow..

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