I'm using a 20G right now. 14 crabs sounds a lot, I know but given the sizes, they fit just fine with a lot of room to roam around and dig. However, it IS reaching its limit.
I have a 10G tank w/ temp/humi guage set aside. I just recently bought it a UTH too. All I'm missing now is sand
I might actually separate the crabs by sizes. But all the 12 PP have been living together for a year now! I feel kind of bad if I take them away from each other.
In any case, I'm rambling on and on about my own tank and crabs. Blarggg
I looked at your picture, it does look too big to be in my current 20g tank so I can't put him in there. However, if your tank offer is still available, I'm interested. I can adopt your crabbie and at the same time, I can go out and buy him some friends if I can get a large tank like that.