4 mm Air Line Non Return Valves

4 mm Air Line Fittings

Air line of course, like the air stones, is essential for any Koi or pond keeper, and allows the air being generated by the Air Pump, to be delivered to the point where it is required.

These 4 mm Airline connectors will help divide or add airline and airstones to your system.

Fits all the 4 mm Silicon and clear Airline above.

Rubber Air Diffusers

The rubber tubing on these diffusers have thousands of very small holes which produce very fine bubble which improves the oxygen content of your pond water.

• These Super high quality rubber weighted air diffuser, are excellent for aeration of ponds.
• Supplies the pond with a stream of small bubble for that extra needed oxygen.
• The Diffusers are manufactured from synthetic rubber which has excellent ozone resistance, solvent resistance, heat resistance, and weather resistance
• Rubber Air Diffusers are easily cleaned and will last much longer than the usual ceramic air stones. These Diffusers are made of rubber therefore much less risk of koi damaging themselves on the product.

Sizes Available:

• 30mm x 250mm Long Air Diffuser recommended air flow 10-15l/min
• 30mm x 510mm Long Air Diffuser recommended air flow 20-35l/min
• 30mm x 760mm Long Air Diffuser recommended air flow 30-55l/min
• 30mm x 1000mm Long Air Diffuser recommended air flow 40-75l/min

These are suited for large bore air pipe 8mm 

Why aerate your koi pond?

If you have fish in your pond, it may be that just a simple waterfall is not doing enough to aerate your water. Proper aeration is crucial to the beneficial bacteria of your filter media, to the aquatic plants growing in your pond and of course to your koi.