The GCTek ZapPRO UV Sterilizer is a heavy‑duty, high‑output UV unit designed to keep large koi ponds and water gardens crystal clear by aggressively targeting green water algae and harmful microorganisms. It uses high‑intensity UV‑C lamps housed in a robust vessel to deliver strong disinfection at relatively high flow rates, making it suitable for serious hobbyist and professional installations.
ZapPRO units are built around a large‑diameter body and generous inlet/outlet sizing, which helps minimize flow restriction and backpressure while still giving water plenty of contact time with the UV light. Many models use dual high‑output lamps (for example, two 58‑watt HO bulbs for a combined 116 watts) to clarify sizeable ponds and handle flows in the thousands of gallons per hour range. The design makes them a strong choice for applications where you want both high turnover and reliable UV performance on a single line.
These sterilizers are intended to be plumbed in‑line with your filtration system and can serve as either clarifiers (focused on green water control) or true sterilizers when sized and flowed correctly. Durable construction, replaceable lamps and sleeves, and straightforward unions or ports help simplify installation and maintenance, so pond owners can keep up with seasonal service without specialized tools.
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