I can't see anything resembling eggs in the picture, though I'm also not really sure where I should be looking. If there are eggs in the photo, you can rule out the gouramis, for sure. Gouramis are aphrophils, which means that they use mucus to build bubble nests at the water's surface, which is where they place their eggs. It also seems unlikely that your loaches have spawned, though it could be possible. There doesn't seem to be any reliable documentation of panda loaches breeding in captivity, and with just two individuals, the chances are slim.