We have two UMC1000ss at the shop I work at. One of them has been having an issue with the coolant foaming bad. After it’s been running for a few moments it loses pressure at the flood nozzles. In the tank the coolant level drops in the chamber the pumps sit in. It does this even if the tank is full. The other UMC does the same thing as far as the coolant dropping in the chamber where the pumps sit yet it doesn’t foam. The refractometer measures the coolant at 7%. We’ve ordered some anti foam for it but could the issue be somewhere else?