After being out of the planted tank hobby for a while I am back. I have always liked the look of amazon swords but I know they get big. Will they get so big though as to take over the whole tank? I don't mind if they grow up and out of the water but I do want space for other plants too. If anyone is growing them in a 45 tall please let me know your experience with them. Also do they need co2 injection immediately? I am going to be low tech for a month or so but I will get a 5 lb cylinder or two and a decent regulator as soon as I can. Thank you.