Sri Vaishnava tradition is a sub-sect of Hinduism, predominant in present-day Tamil Nadu in southern India. The river Ghantaki, flowing adjacent to the temple has a kind of stone called Salagram. The different patterns of the stone are worshiped as different forms of Vishnu. The colour white is considered Vasudeva, black as Vishnu, green as Narayana, blue as Krishna, golden yellow & reddish yellow as Narasimha and Vamana in yellow. The stones are found in various shapes with even shapes of conch and Chakra, the symbols of Vishnu.