Well it is looking good so far. We have had a total of 9 crabs in the 29g. only 4 stayed up. Last week 3 of them went down, so only my biggest crab stayed up. Last 2 days 3 of the first 4 have popped up. I dont expect to see the 4th for another month or so. He was about the size of a racketball. Figured he would take 8-12 weeks. Our 20g is starting to become a ghost town as well as we have only 3 crabs staying up out of 14. none of these are bigger than a half dollar.So far only we have only had one death. Hopefully our luck will continue!