Unfortunately I don't know which species the
Echinodorus is
@Djoko Sauza , if anyone wants to try and find out this is what the flowers look like:
Anyway, it handles low humidity quite well provided the roots are kept constantly wet. The big plant sits in the refugium part of my sump (a good place to raise unexpected fry), so it's rooted throughout the substrate there, but I have smaller ones doing well with their roots dangling in the free water. The big plant needs to have the outermost leaves pruned of every now and then to not completely shade out everything beneath it, with the smaller ones I just remove the roots that are about to reach the bottom, removing excess flower stalks also seems to help the mother plant at low nutrient levels so could be worth doing in your case.
When I started using the sump I found that I could root the cuttings of pretty much everything I tried in there. In the early days this was mostly large quantities of
Ficus benjamina, and now we have those everywhere in the house, so my advice is; be restrictive and use only the best cuttings so you don't get overwhelmed
Carnivorous plants tend to take longer to establish, but once they are growing they are very easy to give some foliar feed (ie some fish food). I haven't tried foliar feeding anything else, the problem tends to be them growing too much rather than to little... Here is what I have rooting in my biomedia compartment at the moment; plenty of african violets on the way in the background (no idea where I will manage to fit all those later), a small boston fern, some
Dendrobium orchids, a
Nepenthes x ventrata, and a little
Pinguicula 'Tina: