[Peter Finke]

I am a lover of Parosphromenus and a lover of Cryptocoryne. But apart from some odd single plants I have up to now not succeeded in keeping and propagating both in one aquarium. It sounds ridiculous, but the answer is the substantial structural difference between the running waters with their constant new fertilization in nature and the very different rather stagnant waters in an aquarium, especially a Parosphromenus-tank, where you are forced to keep fertilizers rather far away.
I know of a chap (a Cryptocoryne-expert who claims to have a solution for both but I doubt it. It would be nice and near to the natural models but the solution seems to need unusal large efforts.
At any rate: carefully remove the substrate in which the plants have been grown!