The picture is really blurry in the first picture, so I'm not sure. In the second picture, the poop looks normal, but is it white and thin in person? If yes, then could be a sign of internal parasites.
At this point your tank is probably already infected, so I would treat the entire tank with medication unless there are other fish or shrimp that cannot handle it.
IMO looks more like a sign of overfeeding, but I could be wrong. How much do you feed your fish and how often?
What is a "pinch" and how many fish are there in the tank? Once every 2-3 days is fine, but they could be feeding them a lot in one day. If you feed a lot your parameters will be affected and bloat can occur.