Hermit crabs (Hermit crab spp.) are popular invertebrates for marine aquariums, valued for their scavenging behaviour and contribution to tank cleanliness. Available in various sizes, these crabs are suitable for reef and fish-only setups, where they help control algae and consume leftover food and detritus.
Care Level: Easy to moderate care, making them suitable for hobbyists with some aquarium experience.
Diet: Omnivorous scavengers; they feed on algae, detritus, and leftover food. Supplement their diet with sinking pellets or specialised invertebrate foods to ensure balanced nutrition.
Compatibility: Generally peaceful and reef safe, though some larger species may prey on small invertebrates. Best kept with non-aggressive tank mates.
Reef Safety: Yes, hermit crabs are considered reef safe and beneficial for algae control, but caution is advised with very small or delicate coral polyps.
Tank Requirements: A minimum tank size of 30 litres is recommended to provide adequate space and stable water parameters. Provide plenty of live rock and hiding places to mimic their natural environment.
Water Parameters: Maintain stable marine conditions with temperature between 24-27°C, salinity at 1.023-1.025 SG, and good water quality with regular monitoring.
Special Care: Ensure availability of empty shells for hermit crabs to move into as they grow. Avoid copper-based medications as they are toxic to invertebrates.
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