Could someone advise :)

[Laurabhspt]

Hi! I inherited a tank with this plant, I have no idea what it is. Could someone please enlighten me? It grew super fast and I had to constantly cut it back, however, I added yo-yo loaches and they ate the lot. I’m trying to save the plant so I have removed it and I wondered if someone could also tell me how to help it grow again? It was still in a mesh pot in the tank, currently I just removed the stalk that was left, popped it in a plastic tub with some tank water and some plant food and a light. I removed it from the pot and unwrapped it from the wool but I don’t know if I should? Should it have substrate etc?
Thankyou in advance!