Having more trouble with the aponogeton bulbs. I uprooted one the first time, but I replanted it only to see it floating around an hour later. It turns out my betta has taken to eating my ghost shrimps' pellets. He gets so excited trying to get at the pellets that he pushes the plants out of the way! The bulbs are growing like weeds, over 5" this week alone. I do not think they are really meant to float though, so is it possible to maybe rubber band or tie them to sort sort of weight? I do not have much in the way of weights, any suggestions?