03-22-2007, 06:43 PM
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Looks like Myriophyllum tuberculatum. Per Tropica, requires Very High Light and is difficult to grow. If you want a red plant under low light, you are probably out of luck. However, you can try some of the Cryptocoryne species - C. wendetii ar. "Mi Oya" has leaves with red/purple undersides, var. Red is a brownish red to purple. I've got Ludwigia repens in a 5/5 gallon with a single T-12 tube over it, and it's growing nicely, with red under the leaves and dark green over. Alternanthera reineckii (Red Temple, it's sometimes called) might possibly work for you sort of, but probably needs at least 2 wpg, and probably more in a 12 gallon tank, and I doubt you'll have more than 1.5 wpg unless you retrofit with a compact fluorescent.