5-Watt Replacement UV Bulb for Filtral 400 All-in-One Filters The Oase 5 W UVC lamp is the direct-fit replacement ultraviolet bulb for the compact Filtral 400 filter-pump unit. Even in small ponds and container water gardens, UV sterilisation is the most effective way to prevent green water caused by suspended algae. Replace the bulb annually to maintain full UV output. Small Lamp, Big Impact At 5 watts, this lamp is sized for the Filtral 400's small pond capacity, but it still provides enough UV intensity to treat the water volume the filter handles. UV output diminishes over thousands of hours of operation, so an annual swap at spring startup keeps your small water feature crystal clear. Specification Details Wattage 5 W Compatible Model Filtral 400 Replacement Interval Annually Type OEM UVC replacement lamp Installation Power off the Filtral and lift it from the pond. Open the UV access panel, remove the old bulb, and insert the new one. Handle with gloves. Reassemble, submerge, and power on. Confirm the UV glow is visible through the housing. Ideal for annual maintenance on the Filtral 400 — replace alongside the quartz glass sleeve for complete UV service.
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