Ok about 3 weeks ago I bought a Ctenopoma and a knight goby. I aclimated the goby to my water (1teaspoon per5 gl) and the same for the ctenopoma. As of yesterday I saw the goby and the ctenopoma were acting strangely. The gobies anus was protuding ALOT and he was as fat as a pig. I also noticed the ctenopoma looked like he was starting to get fin rot (he has a milky white spot on his right pectoral on the end of his fin and near the topof it too). Now just today I went in to check on them and saw him resting in an upright position and the goby had tome white poop that almost looked like the top of broccoli. For the last 2 days I have given them both food medicated with metro+. Thanks.