GlasGarten Shrimp Snacks Leaves Mix Sticks are a mixture of 50% nettle leaves and 50% green walnut leaves. These leaf varieties are very popular in shrimp and snail keeping and breeding, because the nettle is an important supplier of calcium, iron, magnesium and protein, with a high content of natural vitamins and walnut leaves are known for an antibacterial and fungal effect, they contain polyphenols such as tannins/tannins and essential oils. Shrimp, snails, crabs and sucker catfish particularly like to eat these types of leaves, nettle and walnut..