It's melting, it probably happened because of a new tank and a lack of fertelizers, cut the leaves and it will eventually adjust, either stop the fertelizers or keep them going, thats the best way to prevent this, also Swords are heavy root feeders, so make sure you have a substrate that can support these plants, i.e. Dirt, Eco complete, etc...
Then I saw it. I saw a mom who would die for her son. A man who would kill for his wife. A boy, angry and alone. Laid out in front of him, the bad path. I saw it. And the path was a circle. Round and round. So I changed it.
-Joe (Looper 2012)