I put some Rotala walichii in my tank a few days ago- beautiful plant! It has a brownish red tint and the growing tips are green. Kind of opposite the coloring of some other stem plants. Anyway, mine has quickly put out new growth on the tips (actually new branches at the side of the tips) and they are the dark brownish red color. I expected the new tips to be green. I assume this says something is different about the light or nutrients in my tank versus where it ame from, but what?