NAVA NIDHI'S Kubera's depict the Vayu bhootam, out of the panchbhootam. As suggested by my friend Ravichandran Kp both(Padma Nidhi & Shankha Nidhi) form a part of the Nava Nidhis, acquiring which one gets satvik wealth for seven generations. One has practice PADMINI VIDYA to acquire Nidhis. The Hanuman chalisa mentions the Ashthasiddhi & Navanidhis and defines Hanuman as the bestower of Siddhis and Nidhis ( Verse 31) Kubera's on either side of the entrance to the temple. Vaideeshwaran Koil - Tamilnadu.
TEMPLES OF THE WORLD