What is the use of fish tank put sunken wood

What is the use of putting sunken wood in fish tank sunken wood is formed by decaying acid in the swamp, put in fish tank can reduce the hardness of water, adjust the acidity and alkalinity of water, suitable for putting in fish tank which likes acidic water. Before putting the sunken wood into the fish tank, you need to clean the soil and disinfect it by boiling it in hot water to remove the bacteria and microorganisms carried by itself. There are various shapes of sunken wood, usually with water plants embellishment, you can do different shapes in the fish tank to increase the beauty of the fish tank and improve the overall ornamental value of the fish tank. In addition, the bottom of the fish tank will generally lay some bottom sand, placed in the fish tank sunken wood, can play the role of fixed bottom sand. The fish in the tank like a quiet environment, when frightened or disturbed, they are used to find a hidden place to hide, placed in the tank of sunken wood, can meet this requirement of the fish; In addition, sunken wood can also become a fish habitat; understand the fish tank put into the wood what use, fish farmers can better design their own fish tank.