Do not, under any circumstance, put Kuhlii in with goldfish. The goldfish will try and eat them, and thus likely get seriously injured by the loaches gill spikes, not to mention seriously injure the loaches.
But Kuhlii are one of the types of loaches that aren't aggressive. They are quite communal, much like clown loaches. If you want a loach to keep with (smallish) goldfish, I recommend Weather Loaches, they look much like Kuhlii, but have the same water requirements as the goldfish, and are considerably larger and thicker than Kuhlii. They are also peaceful towards other fish. Better tank mates for Kuhlii are guppies and similarly sized fish like most tetras and rasboras.
There are so many storms, hurricanes, and typhoons going on around the world right now that it is hard for me keep track. >.<
But I hope you are keeping safe.