Re: Bolbitis Heteroclita Cuspidata - "Micro"
In the second and third pictures you can see Fissidens Splachnobryoides. This Bolbitis is called MICRO but is bigger than Heteroclita Difformis (caled MINI):
Maybe it is just a mistaken name of this shop.
Cuspidata and also Difformis has the same rate of growth. Some people say that growing extremaly slow, others that it is just very slow. I'd say that's quite slow, but not drastically. It depends on what water quality conditions we will served. Growing quite fast in Co2 and good ground substrate.
If leaves are destroyed or algae then Bolbitis can give a small new plant (seedling) on this leaves, just as Microsorium.