Land hermit crabs breathe with modified gills and need humid air. A practical target for commonly kept land hermit crabs is generally around 70–80% relative humidity.
How do I measure hermit crab humidity?
Use a reliable digital hygrometer inside the enclosure. Do not judge humidity by condensation alone.
How do I keep humidity high enough?
A properly enclosed habitat, suitable substrate and appropriately sized water pools all help maintain humidity. Adjust ventilation carefully rather than allowing the enclosure to dry out.
Can the tank be too wet?
Yes. Humid air does not mean the substrate should be flooded or constantly waterlogged. The enclosure still needs clean conditions and appropriate air exchange.
Browse Hermit Crab Supplies for habitat essentials.