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My largest crab, Sebastian has been digging a bit more that often, so I put him in ISO. He has fresh fruit with honey, a FW bowl, fake leaves to hide on, moss, a log to climb on, good heat and humidity, and about 6" of sub. He stays in the farthest, highest, corner though and looks like he wants out. Right now he is pacing a wall, reaching up. I am giving him the best ISO I can. Any ideas? He just got in there like 10-15 minutes ago. So he may just be exploring?