Two 11w PLS UV bulbs in one delivery. A UV lamp is an annual consumable, not a one-off purchase - and at this size a single bulb costs more to post than it does to make. Buying two at once means one delivery charge instead of two, and a spare already on the shelf when the water turns.

Dimensions: 235mm overall length · 2 pin fitting

Contains

• 2 x AllPondSolutions 11w PLS UV bulb, 235mm, 2 pin

Cheaper than buying them one at a time, and one delivery instead of two.

Specification

• 11w PLS germicidal UV-C lamp
• 235mm overall length
• 2 pin fitting
• Average lifespan approximately 9,000 hours
• Suitable for pond and aquarium use

Fits our own brand

AllPondSolutions CUV-211 steriliser; CUP-311 and CUP-7000; PF-8000 and PF-12000; PFC-5000, PFC-8000 and PFC-12000; AUTO-PFC-5000, AUTO-PFC-8000 and AUTO-PFC-12000 filters. Also fits all major manufacturers' units - measure your existing bulb end to end and check it against 235mm before ordering.

When to replace it

A UV bulb stops working long before it stops glowing. The visible light remains while the invisible UV-C output fades, so a lamp that still lights up can be doing nothing for your water.

• Sterilisation: replace every 6 months (approximately 4,000 hours)
• Pond or aquarium clarification: replace every 12 months (approximately 8,000 hours)

On a 6 month sterilisation cycle, two lamps is a full year of cover. Clean the quartz sleeve at every change - see our UV Steriliser Maintenance Guide.