Japanese Ceramic Airstones - 2 inch - 50 mm
Aerating a pond and filter is very important to all koi pond keepers, you have to remember that most living things including bacteria only survive with a source of air. The benefits of air within the filtration system and pond will be seen in a very short space of time.
Air Stones such as many other products, only have a certain life-span and will need replacing frequently to maintain very best performance.
Size: 2 inch - 50 mm