04-08-2010, 01:37 PM
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Wisteria, scientifically Hygrophila difformis, is a fast-growing stem plant that will grow towards the strongest light source. Usually straight up, but if other plants, filters, heaters get in the way of the light, it grows "around" them. And once at the surface, if not pruned back from the bottom (by pulling it up, cutting off the top portion to replant) it will bend 90 degrees and grow along the surface. All plants grow towards the light source, and this one, being a fast growing stem plant, is quicker to do so.
I personally like this plant for the reason that it will do this. I have my 70g SE Asian tank full of this plant, check out the photos under my Aquariums to see what it is like if left alone. I don't prune it much because I need heavy surface cover in this tank for the Chocolate Gourami and pygmy sparkling gourami [gourami need surface vegetation to swim amongst, build bubblenests, release fry, and they spend a lot of time at the surface breathing air), and their continual fry.