The first filtration system to provide all Koi keepers with premium performance at an affordable price

One unit does ponds up to 7,500 gallons (33,750 litres) 

Nexus with Answer 325 : 150 micron screen : Max flow rate : 10,000 litres/2202 gallons per hour : complete with Kaldnes media

Nexus with Answer 410 : 100 micron screen : Max flow rate : 13,000 litres/2863 gallons per hour : complete with Kaldnes media

Suitable for pump or gravity feed (main pond pump not supplied)

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FREE DELIVERY MAINLAND UK ONLY (customers in other areas should contact us either by email or phone to check on any delivery charges)

Revolutionary Moving Bed Process with Kaldnes K1

• Four times more surface area when static than matting
• Many times more efficient when chaotic than matting
• Healthier koi
• Dynamic fast moving filter media upgrade for existing filters
• Higher surface area
• Better oxygen transfer in moving bed technology
• Self-cleaning - maintenance free
• Open cell media for higher Nitrate removal rate
• 100 litres will handle up to 1.5kg of food per day
• easy to retrofit to most filters, simply add air to circulate the media

Specifications

• Surface area : 800 m2/m3
• Nitrification Ammonium : 560gms/1000 litres in 24 hours
• BOD removal rate : 8000gm/1000 litres in 24 hours
• Nitrate removal rate : 670gm/1000 litres in 24 hours

Note : these removal rates can only be achieved in a dynamic moving bed system

How much do I need?

It is recommended to use about 50% of your filter chamber with K1 Kaldnes

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Manufactured in aluminium, the Airtech range is durable and robust. A brass manifold is included, thermal protection is fitted as standard, and the units are weather resistant

"Genuinely the most powerful air pump on the market"

Main use would be for pond oxygenation, but equally suitable for multi air outlet situations