So my Bacopa has some wonderful new growth on it, but I'd like to encourage more new growth on those same stalks since they were the only surviving bunch out of the SIX bunches I had in this tank. [I feel like I threw money in the garbage]. Does anyone know how to properly propagate/root these plants? I've been reading my book on aquarium plants and it says to cut beneath a node... which node? How do I know I'm cutting in the right place?