I do not do CO2 injection or add anything at all to my aquarium. Not so much 'low tech" as "no tech" ?
Unless I do a major cleanout, there is no room in my aquarium for any more plants but thank you for the offer.
Our medical appts are on hold at the moment but once they resume I will try and remember to contact you prior if you want any Crypt affinis or Anubias nana.