I'm having a problem with anacharis narrow leaf in my 29 gallon. The anacharis is growing like crazy but refuses to root! There's not even roots starting on the stems anywhere. The bottom leaves keep falling off and then the whole bottom part melts into the substrate and then the plants start floating. I'm getting frustrated because no matter how much I vacuum up the debris it just keeps piling up! The anacharis itself looks fine and my fish seem to like it, but I just want it to stay in one spot! I'm about ready to just take it all out and give up on it. Any suggestions?