HCA: Hermit Crab Association

You do know that the water has to be properly cycled before the introduction of fish. And that fish require a large enough space, and if my calculations are correct, this is around 10g of space. Your rainbow crab will make easy work of the fish, since there are no real hiding spots, either that or they will potentially die of ammonia poisoning. If you still have your heart set on fish, please research deeply beforehand, they more work than what people think.

Insteady, have you though of adding more decor to both the land and water section to keep Luna interested in her environment? Plastic plants, logs, hidey holes, rocks are some ideas that you could include. Even a "level' over the water section by using suction cup dishes and a ramp to access the dish... That way, she has more space to roam.

LadyJinglyJones wrote:If the aquarium half is under 10 gal, there isn't much you could humanely keep in there. The crab might like having some aquarium snails to pick off when he's bored... and if you went to your LFS or even put up an add online asking for 'nuisance snails' you certainly wouldn't have to pay for them.

Is that kind of crab at all aquatic? From the setup I'm guessing it's maybe an inter-tidal species and moults on the land?

PinchersAndShells wrote:It's been awhile since I last researched these little guys, but if I remember correctly they can drown so I'd make sure that he has a way in and out of the water.