Hyrotonic is a term often associated with "hypertonic," which refers to a solution with a higher concentration of solutes compared to another solution, typically leading to water moving out of cells. However, if you meant "hydroton," it is a brand of expanded clay pellets commonly used in hydroponics and aquaponics for plant growth. These lightweight, porous pellets provide excellent drainage and aeration for roots while retaining moisture. If you need information on a specific context, please clarify!