Hi all gurus, can someone tell me what plant (red color) is this that I have in my tank. Initially I thought that this is a type of ludwigia. It have been living submerge in my tank for more than a month. Only recently I notice that it doesn't grow at all and the the leaves start melting. It make me wonder if this is a submerged living aquatic plant or not. Actually, at the bottom of the plant, I can see it's root spreading across my soil. Can someone help to enlighten me.

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