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How to look after pet crabs
Fill the tank with about 1/2 to 1 whole centimeter (or more) of sand or coconut substrate.
Place the crabs in the tank once you are home.
Fill the two bowls with crab food and water.
Do not use tap water; use non-chlorinated water. Leave them for a bit of time to get used to the area (choose a warm place and don't move them too much).