Do me a favour and try a couple in half peat half sand with a bottom 50% of the pot being well composted sh.. uh, manure.
Rs,Fine beach sand. I use the stuff I find in a local freshwater and have great success with this method; a few folks around here use it with equal success with crypts, some quite rare.
Just to clarify. You soak all the manure before you set up your pot or you set up your pot with manure in it then soak it? Thanks for sharing.You have to put a thin (12mm) layer of well composted manure under the sand. And you need to soak the manure in water for a couple of weeks first. If you don't, you can expect yuckyness for a while, then it settles down ad grows crypts better than anything I've ever seen.