Lifegard Aquatics Quiet One Pro Model 1200 Impeller (R440112) Replacement Impeller for the Lifegard AquaticsQuiet One Pro Model 1200 Pump. The Ceramic Shaft is NOT included This Impeller is the replacement for both the pond & aquarium Quiet One Pro Model 1200 Pumps. Lifegard Aquatics Part# R440112 This part is for the Quiet One Pro Series Pumps only. It will NOT work with any of the the Quiet One Original Series Pumps.