Anyone ever keep these guys? I hear they're more challenging than other fish but other than that, I don't know too much about them. Looked up some general info on a few sites, but they didn't tell me anything I didn't expect to hear. (peaceful tank mates, lots of hiding spots, can be outcompeted for food, etc) I was wondering if anyone here has some first hand info. I'm not really planning on getting one, I'm moreso just curious. Maybe down the line...