planting Elodea/Anarchis

[Theplatymaster]

So i have a few small stems of elodea/anatchis that i got from a lab, and i want to put them in my new shrimp tank. However im confused how to plant it, on youtube the people say to put it near the gravel, but it floats if i do that, so How do i plant this stem plant?

[FLFishChik]

I came by a sprig of this by accident- tiniest bit came in my bag of ghost shrimp. I was too lazy to try and met it out that day and left it for the next. Needless to say, I forget about it. When I saw it again, it had grown a side sprout and tiny hairlike roots. I plugged it (very carefully) down into the gravel and it’s been growing there ever since. My corydoras did manage to uproot it but I just tucked it back into the substrate and it’s as if nothing happened. 
 

first pic is when I first planted around Christmas. Second pic was a few days ago.

[Lennie]

I used to plant them, now I have been floating them for ages. Once they are floated, they randomly grow roots in some places, so I think you can plant those roots. My shrimp love the floating jungle they have created over time:)

If you don't want to float for a while, or don't wanna use it as a floating plant, I think they will still do okay even if you just get the bottom leaves out and plant it like a random cutting. I saw them being sold at my lfs like cuttings like that.

As far as I know, they feed from water column a lot no matter what, even if you plant them!