I see your problem.
Well, in fact, our argilla is to be taken by tea spoonful. You put a thin tea spoon of argilla in a glass of water at night and you drink it in the morning without drinking the muddy bottom. I know it is not easy at all...
As for psyllium husk, we have psyllium seeds, which are more powerful than husk alone, because they produce more jelly, that kind of translucent liquid that helps when one is constipated.
May I ask you from which country are you? I don't know, but I can send you at least the psyllium seeds, anyway, let me know. In case, can you tell me how can I reach you without rendering my email public?