Hi, I've had my 2 crabs for 10 months now. They were pretty active up until about 4 months ago, when I cleaned out their tank for the 2rd time. Once I placed them back in they buried themselves immediately, and didn't resurface for a month or so. I assumed they were molting, but since then I've only seen the larger crab 3 or 4 times. I've been waiting for them both to be out at the same time so I can clean the tank but it doesn't seem like that's going to happen anytime soon and the tank is a complete mess. I'm pretty sure he isn't molting, can I just dig him up? Thanks!