Red Lava Stone Volcanic Rock 1-2CM & 3-5CM Aquarium Filter Media/Cactus Succulent Plants 1kg

For succulents, volcanic stone's greatest effect should be to enhance soil permeability and improve soil structure; followed by adsorption of harmful bacteria in the water, heavy metal ions such as chromium, arsenic, etc., and can also absorb some residual chlorine in domestic tap water; The volcanic stone contains trace elements and minerals that can promote growth and enhance immunity, and the large pores can cultivate nitrifying bacteria and other functions; volcanic stone is also a good buffer substance that can adjust the soil PH value within a certain range.