I have this HUGE Xenia... http://www.3reef.com/cgi-bin/album.pl?photo=birdlady/xenia3.jpg and I really need to hack it up! The stalks have gotten long because it is at the bottom of my tank. My question is, can I cut each frag at the branching part.... Where it forks out like a 'Y' can I cut off each top? If I cut all the tops off, will the bottom stalk grow new branches or should it be tossed? THANKS!!!