Any tips as to what to do with the "extra?" My tank is well stocked. I have the cobambas by the side of the tank. The tall ones are from 1 ft 6 inches to as long as 2ft. I don't have much room to replant them. Is it a good idea to trim the top half but to "remove" the older half and replant the newer stem the same spot. The older stems have been plagued with diatom earlier. They don't look as green.