Red snapper fish soup

Ever since our 2 weeks 'vacation' in Labuan, we fell in love with red snapper fish soup. We had it almost every other day. I tried to make it at home every once in awhile. It's good but not as good as the one in Labuan. I wilk make more research on this until I have perfected this recipe.
Ingredients:
Red snapper
5 cloves of shallots -thinly sliced
3 cloves of garlic -thinly sliced
2 inches of ginger - thinly sliced
1 stalk of lemon grass
1 stalk celery stick
1 tomato - cut into 6
Adabi fish soup spices packet (sup bunjut)
water
1 whole sour plum
You can ground the onion,garlic and ginger if you like but i prefered it sliced.
Sauted the spices in the packet ( consist of 1 bay leaf, 1 cinnamon stick, aniseed, cardamon and bouquet garni). Leave out the bouquet garni. Sauted it together wit the ginger, shallots and garlic.
Add water, celery stick, lemon grass and bouquet garni. Bring to boil and add in the sour plum.
Add fish and salt to taste.
Garnish it with chinese celery and done!