Effect Of The Poisonous Cake

The three Paris and Baalveer leave to bring back various items from Pari Lok and Madhya Saagar. Mahavinashini has poisoned the water around the Pavitra Tree! Now it falls on Baalveer to bring the Pure Moti and save all the kids from Mahavinashini's poison. But a shark is in the Kund, protecting the Pure Moti. How will Baalveer get out of this?