- Our first recommendation of course would be to use our Pre-mixed Substrate. We have hundreds of customers using it successfully in their crabitats for many years now. It arrives pre-mixed and moistened, ready to pour into your tank. It packs well, providing good protection for molting crabs.
- Clean “All Purpose Sand”, found in many hardware stores, is another alternative. We have been told by our customers that some All Purpose Sand is listed as being pet safe and screen washed. This type of sand is beige/tan in color, fairly course in texture and tends to pack and hold moisture very well.
- Some Beach Sands work well and contain bits of seashell and natural sea salts that will be beneficial to your crabs exoskeleton health. Again coarser sand seems to work better than fine sugar sand. Keep in mind that natural beach sand may also contain sand fleas.
- “Play Sand” can be used as well, although it is not my first choice. Play sand tends to be very light (almost white) in color, more fine than All Purpose Sand and does not hold moisture as well. If you use Play Sand make sure that no antibacterial or anti fungal agents have been added to it.
- You can even use Backyard Soil if no pesticides or fertilizers have ever been used in it.
Calcium type sand often sold in pet stores for hermit crabs is not suitable for use in a crabitat. It is very fine, powdery and easily sticks to a hermit crabs moist abdomen, not to mention it is typically very expensive. It is also designed to be used dry which does not allow hermit crabs to bury and successfully re-surface after they are done molting. One of the benefits touted for this substrate is that it clumps readily to wet waste material. As stated through out this section, your substrate needs to remain moist, making this sand unsuitable.
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Using moistened coconut fiber by itself in your crabitat is also poor choice as it provides molting crabs with very little protection increasing the chance of cannibalism. Using a mixture that is primarily sand (5 parts sand to 1 part coconut fiber) is much more protective.
Remember, moisture is critical to enable hermit crabs to bury. You will want to maintain “sand-castle making consistency” of your substrate so that your crabs can dig and pack an underground cave and air space in which to molt. Dry sand will cave in on them as they try to bury. Add purified or even salt water to your substrate mixture as needed to maintain packing consistency. If crabs are buried, mist the surface well to prevent the substrate from drying out until they have resurfaced from molting. Then when you are certain that no crabs remain buried and molting, you can remove everything from the tank, add fresh water as needed to re-moisten and thoroughly re-mix your substrate to the perfect consistency so that it is ready for the next molting crab.
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SUBSTRATE DEPTH MINIMUM AND MOLT LENGTH DEPEND ON HERMIT CRAB SIZE
Size of crab (overall – crab and shell) TEENY (dime) (1/2″ or less) TINY (penny) (3/4″) SMALL (quarter) (1″) MEDIUM (golf ball) (1 5/8″) LARGE (tennis ball) (2 1/2″) JUMBO (larger than a baseball) (3″ or more ) Minimum sand depth Molts per year Length of time buried
Additional Needs
- A bowl of freshwater to drink and soak in.A bowl of saltwater to drink and soak in.
- A diet of good hermit crab food supplemented with fresh produce.
- Temperatures between 65 and 85 degrees Fahrenheit, 78 degrees is ideal.Humidity between 60% and 80%..
- Extra properly sized shells to move in to.
- Areas to hide in and stuff to climb on.
- Friends to keep each other company.
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