DescriptionThis professional air bubble stone, made of premium material, is durableand practical with long service life. It is a great way to add oxygento your aquarium, fish tank, hydroponic and circulation system. Greatfor fish tank and aquarium use. It will be the good choice for you.Features-Color: Black -Material: Sand and gravel -High temperature sintered bubble stone is made of high temperature sintering, different from the general market bubble stone -The material is strong and durable, can be repeatedly cleaned, long-term use. -Soak the product in water for 15 minutes before use. -Connect to the air pump, and put into the water to help the air pump oxygen into the water, need to connect to the air pump to have air. -The air pump you used on the surface is not enough, please replace it with a more powerful one.
