Eight days after the fishes spawned, I put the cave with the larvae in a small aquarium with 4l water from the Paro tank. The black larvae are hanging inside the cave. I put the very light air stream a few centimeters away from them. Water parameters are: Conductivity 30uS, Temperature 23 degrees C, pH 5.
I hope it works!
After the cave was out of the Paro-aquarium, my female attacked the male heavily. Now I covered the aquarium with an blanket.
Perhaps she will be calm again after sleeping…