I have a Golden Gourami who appears to be having seizures. I have had the fish for six-eight months now and have never seen this behavior from it before. We have other Gouramis which we bought at the same time and a few others of a different type which were also purchased around the same time. It will be swimming around fine and then all of a sudden swim all over the tank as fast as it can and then collapse on the bottom bend in a L shape twitching for a while, then get up and swim around like nothing happened. It has happened at least three times today, I checked all of my levels and they are all decent (.25 ammonia, no nitrites, and a small amount of nitrates). Has anyone heard of anything like this?