I'd never really had live plants in my aquariums until about 2 weeks ago, when I decided to pick up 3 hornwort plants from the lfs for my 55 gallon. I'm still just using a Sun Glo bulb, but they've grown noticeably in length in the 2 weeks that I've had them. I want to grow more, but I'm not sure how to go about it. If I cut some of the length off and let it float in the tank (or try to root them) will the pieces grow on their own?