For the Taiwan, it depends. Sometimes I will just pinch the top leaves. It will get thicker that way.Looking great! How do you deal with Nymphoides taiwan when it reaches the surface? I have them in a few tanks and have short stems from pruning them everywhere.
Also, what's the burgundy plant front towards the left?
And them sometimes I pull the whole clump and remove 4" or 5" from the bottom and replant. It's about the most trouble free plant there is. No matter what, just grows and grows.
Front left burgundy is Barclaya Longifolia. Almost lost it when I changed substrate. It melted to nothing but the bulb. Now it's back to it's former glory and really is a striking eye catching plant.