Open SENTNEL 3 olci in envi and qgis sowftware

I have a problem when open file output from snap software like Sentinel 3b also in Qgis software
All of value appeared with minus value Although they are concentrations of some substances, how can this problem be solved?

I I look forward to a reply and answer

hi aminoacid ,

the data has scaling information attached which is provided in the xfdumanifest.xml file but not in the netcdf file.
SNAP is considering these values.
In other software you need to do this manually