The bubbles will take a few days to go away. They don't cause any harm. You can wipe them away with a sponge if you want.
Did you cycle the tank? Two goldies will be too large for a 10 gal
tank if they reach adult size. If you didn't cycle the tank by seeding the filter with colonized biomedia, you can have quite high ammonia and nitrite levels rather quickly in a 10 gal
tank with two goldies in it.