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๐ง Crystal Clear Pond Water โ High-output 6W T5 UVC tubes help eliminate green water by neutralising free-floating algae as water passes through your UV clarifier. Restore clarity fast and keep your pond looking healthy. ๐ True 6W Germicidal UVC Performance โ Precision engineered quartz glass ensures optimal ultraviolet transmission for maximum sterilisation efficiency and improved filter performance. ๐ง Universal T5 2-Pin Fit (210mm) โ 210mm tube length (225mm including pins). Double ended with 2 pins at each end. Compatible with most pond UV clarifiers and filtration systems requiring a 6W T5 UVC bulb. ๐ Recommended Annual Replacement โ UVC output reduces over time even if the lamp still lights. Replacing every 12 months maintains peak algae control and filtration efficiency. ๐ฆ Twin Pack โ Great Value โ Includes 2 x 6W Aqua-Terra Lighting UVC replacement tubes. Ideal for seasonal changeovers or keeping a spare ready.