Well yea, I think 20L comes out to about 5.5 g or so. I wanted to do a setup like that with a canister filter and maybe a spray bar. I need silence when i sleep, it would drive me crazy too lol. Black Sun are you gonna keep anything else with your crab?
Probably not, save feeders. Without having found much information on the species, I'm very hesitant to house him with anything else. Even more so, with the common repetition of "more aggressive with old age" that I'm finding cited here and there. Seems like it would limit long term tankmates, meh.
That and with the current set-up, he's limited to sharing only floor/climbing space with other terrestrial animals (the water area is too small for long term aquatics). I'm not sure what I could put in there that he wouldn't consider food or wouldn't consider him food. You know, save another crab and I don't have a free tank large enough for a M/M pair (the stores around here only sell the males). *shrugs*
Maybe later on I'll house something with him, but for now I'm fine with having him housed solo. Vinny seems cool with it, too lol, he gets the whole tank to himself. :grinyes: