[Peter Finke]

Hendrik:
1. Are you sure that the male eats the eggs? There could be different reasons for eggs disappearing (snails or other “robbers”, bad fertilization, …).
2. Sometimes males eat eggs. This is often encountered with young males/pairs; normally they will learn the right behaviour in some time.
3. In the case of several pairs of parvulus with all eggs disappearing overnight Horst Linke gave the advice to reduce the pH drastically (from 6 or more to 4 or less). Indeed, that was helpful! But I do not think that this is the method to be followed with filamentosus. They do not need such very low pH.
4. I should say the same as Helene: wait and see. A good young pair will spawn frequently. The most probable thing is that they will learn.
5. It is surely very rare that a male will never learn. Once I had that impression, but I do not know exactly. Maybe it was my interpretation.
6. Nice pictures! Helene: I suggest to put the photo of the female additionally to the others at the bottom of the species-text on filamentosus with the following description: displaying female during courtship, with “sexy eyes”, dark dorsal and analy fins and light body withou any stripes. Photo: H. Wimmer
I hope that you will allow that, Hendrik?