An air stone attaches to the end of the silicone tubing to create a fine “mist” of bubbles under the water. This greatly helps in the aeration of an aquarium.
Made from Chestnut Sheep can feed on rough pasture which is unsuitable for cattle or agriculture, including mountainous terrain. Seasonal herding along mountainous routes gave rise to what are now known as drovers' roads. A strong, multi-purpose stick can be used for balance, examining dangerous undergrowth and for defence against attack by predators. The innovation of a hook facilitates the recovery of fallen animals by ensnaring them by neck or leg. For this reason the crook has been used as a religious symbol of care (particularly in difficult circumstances).