Filipino Recipe Sinigang na Bangus at Hipon (Sour Soup with Milkfish and Shrimp)

1 medium milkfish (cleaned, cut into 4 pieces)
1/2 lb big shimps
1 bundle kangkong, cut 1 inch in length
1 big ginger, sliced
1 medium sized onion, sliced
1 pack sinigang mix
salt to taste

How to cook:
1. In a casserole boil milkfish, ginger, onion and sinigang mix. Bring to a boil for 15 minutes.
2. In a saucepan cook the shrimps with little bit of water.When shrimp changes color remove from heat.
3. Add shrimps with the milkfish and boil for another 5 minutes.
3. Add kangkong leaves, boil again for one minute.
4. Salt to taste.
5. Serve hot.