I have a leaf of what i believe is java fern (this leaf came in with some other plants, so not 100% sure what it is, but looks like the pics of java fern). anyways the leaf has some what looks like baby plantlets growing off of it, about 3 small leaves and 3 or 4 inch long roots per plantlet. how big should i let the plantlets grow before i attempt to detach them from the 'mother leaf' and try to anchor them on their own rock?