Stefanie, thank you very much for this new thread that will certainly interest many people. The problem with Fontinalis antipyrectica is temperature again. There are plants from slightly warmer regions and many from cold ones; the latter dominate in Europe and the mosses are less suitable for a warmer aquarium. But if you are lucky and find a population adjusted to warmer waters they are wonderful. You are totally right in recommending it for Paro-tanks.
I experimented with some mosses that are sold by the aqiarium trade since several years. Again the problem are the special water values with the Paro-waters and sometimes little light. But generally it’s rewarding to use them. But most of them grow rather slowly, much slower than “Javamoss”.