I have a tank that has cycled for about a month. I have 3 Opaline Gouramis which appear to be doing fine - 1 died the first night. Store had no more Gouramis, so I got a single Emerald Cory to replace it. When I got the cory home, he was not very active in the bag while I adjusted him to the water temp - less active than previous Corys Ive had. Since I've introduced him to the tank, he spent most of his time sitting on the bottom. When he does swim, he usually heads up and down to the top of the tank, and his swimming is not normal. At this point I'm assuming that its stress from introducing him to the tank. Does this soudn right, and can I do anything to help him out?