In addition to the volume increasing from 60 liters to 200 liters (= 15 gallon and 50 gallon, in round figures), we need to know the dimensinos (length and width) as this is the surface are of the substrate and the water surface, both crucial aspects of fish needs.
There are some stocking issues with the existing fish, regardless of the tank. Hillstream Loaches do not work with the other fish mentioned. They have very demanding and different requirments respecting water current and temperature. The Hillstream Loach could remain in the 60 liter tank, with a suitable aquascape: good current from the filter, room temperature, and smooth river rocks for grazing. None of the other mentioned fish will bee healthy in this environment so theey can go into the larger tank, with increased numbers for the shoaling species.