One. Container filled with water without a lid. Should put a little sand or water coating chemicals. Prevent the breeding of mosquitoes. (1 chemical protective coated sand for 3 months .
1. There are no water enters the container lid or small water bodies should enter chemical coated sand. To prevent mosquito breeding, chemical coated sand (1 enter. 3 months protection.
1.container is not a source of water or small cap should be put sand coating chemicals prevent mosquito breeding sources (sand-coated chemical protection. 3. 1 months