Potted plants always getting root rot? Old gardeners line the bottom of the pot with this, and there's no root rot for 5 years

Plants getting root rot again? Spread a layer of this stuff on the bottom of the pot, and potted plants won't get root rot for 5 years. Old gardeners all use it, and the leaves are lush and the flowers abundant!
An old gardener told me that actually putting a little of this stuff at the bottom of a pot is better than anything else. It's expanded clay pebbles. Even buying a bag doesn't cost much, and it's very convenient for growing flowers.
Expanded clay pebbles have a special structure that is porous, lightweight and high in surface strength, meeting a plant's need for water while also meeting its need for airflow. Placed at the bottom of a flower pot, they can prevent waterlogging very well.The role of expanded clay pebbles placed at the bottom of a flower pot:
1. Expanded clay pebbles have the ability to retain water and fertilizer. Their internal pores are filled with air when there is no moisture; when there is plenty of water, they absorb a portion of it; and when the surrounding moisture is insufficient, the water inside the pebbles diffuses through their surface into the pores between the pebbles, for the roots to absorb and to maintain the air humidity around the roots, which is good for flower growth.
2. Expanded clay pebbles are lightweight, which makes them easy to carry around. Potted plants sometimes need to be moved, and lining the bottom of the pot with them adds very little weight. They can also be reused, so nothing goes to waste. 3. Expanded clay pebbles themselves have no odor and do not release harmful substances. They have been sterilized at high temperature, with no pests or diseases breeding in them.
When repotting flowers, we just need to spread a layer of expanded clay pebbles at the bottom of the flower pot. If the pot is relatively large, we can put in more. They can also be placed directly on the surface of the pot, which can also help make the pot surface look attractive.