The microporous design and airtight construction produce fine, evenly distributed bubbles to maximize oxygen replacement and reduce CO2 levels. Quality materials. The air bubble stone is made of sand and high quality plastic. Strong, durable, non-toxic and safe for fish. With long service life. Easy to use. Intake is compatible with standard overhead tubes. Connect to the air pump and put it into the water, helping the air pump to pump oxygen into the water. Widely used. The device is easily installed in hydroponic systems, ponds, aquariums, tropical fish tanks and more. No matter what problem you have, email me. I will answer you as soon as possible. If you are not satisfied with the product, we have no problem with a full refund. Features - The air diffuser stone, durable, good gas permeability, good filtration ability. - Increase oxygen levels, reduce CO2 and increase PH. Filtration and water quality ozone, sterilization and aeration. - Bubbles in the tank while connected to the
