just did a huge trim on my tank. more stems just by cutting the tops off...what a beautiful thing! oh and my regulator just showed up! hehehe co2 is being set up now! pictures later
My recommendation if you can be patient is do nothing believe it or not because your plan to add pressurized Co2 can change the tank itself and you are going to be deciding what to do again in a few weeks.
Cuba under the right conditions in my 120g can get 3" accross per stem see post #18 2nd pic
http://www.aquariacentral.com/forums/showthread.php?t=172101&page=2
so some of the species in your tank may or may not go through a drastic change it is probably to early to make those decision right now.