Pongu Snai is the second cycle of Sadesati Shani. Pongu Sani dasha comes after the age of 30.
The second phase will do good to the native, but his father will be affected by the Saturn. The native will acquire wealth and good events will happen during the second cycle of the 7 ½ Saturn period.
What is Sadesati Shani?
Whenever Saturn transits the 12th, 1st and 2nd houses from the Janma rasi (natal moon sign) it is called as sade-sati, Ealarai naatu sani or 7 ½ Saturn period. ‘Sade-sati’ literally means 7 ½ years.