i have a wild caught rhombus, and i want him to ba as happy as possible so i want to make him a replica of the amazon rive for him chemestry whise and so far its not been easy, my ph is normally 7 or greater my hardness is 1500 or more and my is below a stable amount and idk what my acidity is but i assume high and idk how to measure it. but in my tank i have some plants, 3 japaneese moss balls, and 2 amazon swords. what other plants can i add withh low light. i was considering duck weed but wasnt sure is it would make the light in the tank for the other plants too low i also have two 10' peices of drift wood, and ive considered peat moss but dont kno much about is any expert advie is more than welcome