I recently added 6 tiger barbs to a 29 gallon tank around a week ago. I'm not sure how long it's been there, but i noticed a tiny white dot on the tail of one of the tiger barbs a few days back. I didn't have any ich medicine on hand and I have a school of corydora catfish in the tank so I didn't want to put in a dose of salt. I tried to photograph the fish but it was moving too fast and the white dot was too small. Its been about 4 days since I noticed it and it hasn't increased and none of the other tiger barbs have it. The tiger barb in question eats and swims normally and doesn't seem to be acting unusual. The only weird thing I noticed was that the two larger tiger barbs (one of which is the barb with the white spot) has big bellies. Their stomachs aren't wide or thicker than the other but just hang a bit longer (almost the same length as the bottom fins). It doesn't look like dropsy or anything and it doesn't seem to affect their behavior. It just makes their body shape look a bit odd. I didn't think it was a problem and just assumed that they were eating more than they should because of their size, but I felt like I should mention it in case it was related to the white dot somehow. I'm not sure what to do because if the dot is ich, it hasn't spread anywhere else and I might just be over-worrying. This is my first community tank and previously I only kept single fish alone in large tanks (oscars, blood parrots, etc.). I'm kinda paranoid because I've lost more than one fish to ich. If it is ich, I don't want to lose 12 fish, but it's been almost a week and nothings happened. Should I be worried about it?