A few days ago I noticed a small (0.5 cm) tear on Buddha's tail. He had this problem before and I did not panic. I just kept his water clean, added Vita-Chem and Stress Coat. Today morning I did a water change, rearranged his decorations and was happy to see this tear getting better. 20 min. ago I checked on him and saw that his tail was shred into stripes! I have no clue what's happened with Buddha and his tail but the tail looks scary. Buddha doesn't have any decorations with sharp edges. I don't see any tail's pieces floating around... Could it be fin rot? Please, help!