Be careful of the bioload though as the tank seems to be rather small. I am not sure of these red claw crabs, but they do stay small right?
Assuming the crabs stay small and there is an efficient filter running, probably the limit would be additional 2 or 3 other fish of no more than 3 cm in size. Perhaps, bumblebee goby? I am not sure though if the crabs would fancy the fish as snacks, I just don't trust crabs with fish.![]()
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