5" Cylinder Airstone / Air Diffuser
These Aluminum Oxide airstones are extremely durable, long lasting and can be repeatedly cleaned as necessary. Also great for hydroponics as they produce fine bubbles which increases the surface area and circulation through the water column
Features:
You can use rainwater to fill your pond, but keep in mind that it is very soft water. If you primarily use rainwater, be sure to check your pH regularly because it could become too low and cause serous problems.