5 cm (2inch) diameter airstone

Ball air stone, helps increase the level of dissolved oxygen in the pond water.

Mutipurpose dumbell style pond airstone, helps increase the level of dissolved oxygen in the pond water.

7cm/ 2.75inches long

50mm/2inch cylindrical airstone.

Cylindrical air stone, helps increase the level of dissolved oxygen in the pond water.

Heavy bubble disk type airstone suitable for larger ponds.

Pond air stone, helps increase the level of dissolved oxygen in the pond water. Suitable for larger ponds, 13cm (5inch) airstone

125mm/5 inches dia flat airstone.

225mm/9 inch diameter flat, disc type, pond air stone.

Heavy flat air stone with a 28 liters/min jetting volume. See table below to estimate how many of these pond air stones you would require to adequately aerate your pond.