Ginger is a natural antiseptic that kills the fungi that cause dandruff. It inhibits the growth of yeast, stopping flakes, itchiness, and dandruff before they happen. (Source) It reduces inflammation of the scalp as well as treats scalp acne due to its antiseptic properties.
Glass substrate is a sheet glass which makes flat panel displays (FPD), such as liquid crystal televisions (LCD), plasma televisions (PDP), and laptops displays. The ingredients differ from the sheet glass used for windowpanes. Ingredients also differ between liquid crystal and plasma displays.
Gravel is the most frequently used aquarium substrate, and with good reason. It comes in a variety of sizes, shapes and colors, and is a good all-purpose substrate. As with any substrate, it is important to know the impact that the chosen gravel can have on the water chemistry.