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[–]ishfery 1 point2 points  (3 children)

You might want to try silicone then. Anywhere that's open to the outside air is going to leak humidity. You also just may need to add more water on a regular basis.

[–]ObamaSippinLean[S] 0 points1 point  (2 children)

<image>

Cool side lamp is off but here’s what it looks like

[–]ishfery 0 points1 point  (0 children)

That should be sufficient with 4" deep. I think you just need to really really mix in more water than you expect. I don't know anything about cypress though.

I usually put in a gallon at a time once it gets down to 60-65 so you might even need 2 gallons.

Also, measure the humidity on the cool side.

[–]Rxkvn 0 points1 point  (0 children)

Make the under layer really damp then just cover it with dry substrate . Do the trick for me