for a start they need high humidity (mine are in a tank with a full glad wrap cover) and most of them do better with some kind of warmth (mine have a heater in the water with a small pump circulating)
All of mine have a substate of about 1 part fine sand, 1 part topsoil and 1 part daltons, and a few oak leaves then a thin layer of gravel on top (isn't really needed) then a single JBL ball underneath all of this is in pots with a single plant per pot
fert wise I don't think they need much else apart from that ^ but I have started to stick a drop or 2 of PMDD directly into the pot to see if it will make them grow faster, excel won't have any effect
sunlight should be fine for most of them, mine have a single CFL over top(with whatever else light gets to it) but they will probably grow faster with higher light
with replanting them just stick the whole thing in, then it will most likely melt (the leaves will decintergrate) you can cut all these leaves off and after a while it will grow back with emersed growth keeping the water leave a few cms above the base of the plant seems to help
HTH :lol:
quite a few of the really nice ones we don't get in NZ though