Your plant and the snails look very happy indeed Calin! Those tiny little snails used to be the baine of my life when I kept fish. I had a beautiful 5ft tank with a few live plants. One of them must have had a couple of snails on it when I bought it and being so small I didn't notice them until they began to multiply.... I ended up with hundreds lol I thought that my puffer fish might make a snack of them, but it turns out that he wasn't interested in anything smaller than a cockle in its shell.