Green watery poop from baby

My baby girl is currently on Similac total comfort formula milk and has been having this green watery poop for over a month now. Done my research online and checked with the paediatrician, both said there's nothing to worry about. She's not showing signs of discomfort nor is she having a diarrhoea (she passes motion only once every day). However is this still okay if this poop persists for this long? Sorry again for the poop photo.