09-02-2009, 12:47 PM
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Originally Posted by Byron
This is common. Except in fairly high-teck tanks I wuld even go so far as to say normal. Stem plants are fast growers, needing higher light and more nutrients than rooted plants. Light rarely gets to the lower leaves in adequate amounts due to the upper leaves blocking it. And stem plants are higher maintainance, meaning you regularly have to prune them to avoid what you've described. My Brazilian Pennywort does much the same, and when it gets longer than I want it I pull up the stems, cut off the bottom parts (with the yellowing or no leaves) and stick the tops back in the substrate to grow up again.
The light also affects the red plants, but as you indicate the tops are OK it is not a light problem, other than what I've mentioned above.
so basicly prune more? sounds good to me thanks :D I also have the pennywort you do but its yellowing and getting dark green spots on it for some reason. i leave mine free floating.