I am not convinced at all. Even in this video one can see that Paros don’t usually take food from the surface, they don’t like it. In nature, they do it very occasionally only. But if the aquarist offers them nothing else, they are forced to behave like this.
One should feed them the most natural food as possible. I am not against an occasional surface item, but as a main food it’s wrong. I doubt that they get fertile this way. This is always a good test. Feeding Paros by collembola: This is typical aquarist’ non-biological thinking.
As is the water garden to be seen here. It’s nearly impossible to maintain a stable low pH and a mineral content near zero in such a horticultural milieu.