These hardy crabs are great for eating algae in the aquarium. They are known for eating the very undesirable bubble algae. They will also help with eating leftover food. These are great scavengers. In a 30 gallon aquarium we recommend 1-6+ of these crabs in a 30 gallon aquarium to give you a general stocking idea. They are safe to keep with our captive bred seahorses.
Give us a call 410-618-3604 or send us an email: firstname.lastname@example.org if you have any questions. We are happy to help!