Dried Stinging Nettle Leaves
Premium British grown nettles. The tips alone of fresh nettles have been collected and air-dried to retain maximum nutrition. Stinging nettle makes a great source of nutrition for your shrimp and similar creatures. Underwater they will soften further, and don't worry about the sting, generally air dried leaves have lost their sting, although always be careful especially if you are allergic.
Nettles contain a variety of nutrients, including some essentail vitamins, and unlike Indian Almond Leaves they won't lower your pH, although in very soft water and in large quantities they might raise it slightly.