I have had my incubator running for a few months now and all is just fine operationally with my Herpstat 1 and a remote temp indicator on a higher shelf.
I just figured I would check the Vermiculite/Perlite mixture yesterday. It had dried up a touch, but there was still slight condendsation on the tub walls... Stelite 6qt tubs w/ snap on lids- not locking lids. I decided to "juice up" the mixture till there was ~1/4" of free water on the bottom of the tubs. I put a cheapie Hygrometer in one tub on the top shelf and one tub on the bottom shelf. They are both currently showing 88-90% humidity. The fan is on a rheostat and currently running at ~1/2 speed.
Is this humidity high enough?? Should I use press-n-seal??
Pics for reference (before I added water yesterday):
A nice steady 88.5F by the Herpstat w/ second remote monitor one shelf higher than the Herpstat sensor indicating within 0.5F and showing incubator (not tub) humidity:
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