The most important thing in this soup - a strong fish broth. We strongly recommend to make at home, but in any case not broth cube. Here's my version of the broth: bones, tails, heads, and skins of fish that remain after profiling, this time, and even shrimps, celery, a few slices of leek, carrots, a few stalks of dill or fennel and parsley, black pepper grains, and a glass of dry white wine. Cooked fish broth for about an hour maximum, so it is necessary to Tinker. And the finished broth can be frozen, so it will always be at hand.