I just added a red claw into my 10 gallon tank that was already set up dor my fiddler crabs that I previously had. Is there anything I need to change for the red claw? I decided to try a new type of crab .I have the beach area still, and a green rock with the top out of the water. I have the beach lined with little rocks and shells to help separate the water and keep it somewhat off of the beach. Is there anything else I'm missing that I should have for him? I have a bubbler and a filter also . Thanks!