To the questions of the Almighty:
1. Shyness: You can overcome the shyness by giving company of Boraras species. But then, no young will survive.
2. Rooted plants, Cryptocoryne etc.: Think of the structure of a blackwater aquarium with pH of 6 or less and water with minimal mineral contents. You cannot add plant fertilizers in order to prevent those values to be changed considerably. Therefore planting is restricted severely. If you speak of Cryptocoryne, you probably mean Sri Lanka species. Borneo and Malaysia species (although they should be adapted to those water values) require “nutritional springs” of non-stable fertilizers (as two-valued Fe) in a river with fluent waters; you cannot cultivate them in the normal aquarium conditions). Sri Lanka species are easily to cultivate in normal tanks, but not in the water mentioned above. Of course, you can create a moderate milieu not below pH 6.0 and with a small amount of minerals and use many plants in that to a certain extent. But it’s a compromise. Plants constantly change the water conditions in order to be able to live. Therefore, most friends of Parosphromenus either dispense with plants altogether or restrict planting very much to javamoss, java fern and swimming plants. I recommend to use a very thin layer of chemically neutral gravel only (not more than half an inch or less) as a settling ground for bacteria but not for the roots of plants. Everything else is a compromise. Of course, you can accept that (I do sometimes, too), but I don’t see any better solution for reasons of the structure of an aquarium which is different to a habitat with running water and a voluminous ground of peat and old organic materials.
3. Jumping: Most Paros don’t tend to jump since they don’t use their labyrinth. But there are exceptions. There have been losses by fish jumping out. I did not experience that myself, but there are reports that it happenend.