I had my pump replaced FOC by Yi Hu, that's after Paul from Redsea asked them to replace the pump for me, you might refer to the earlier message for details. Now the skimmer is running like new liao. However my prizm is only 1 month old.
I talked to Peter from Yi Hu who helped me to replace the pump. He said that no spare pumps are avaliable. You might have to bug Yi Hu to bring in the spare motors.
I was also told that Redsea is redesigning the impeller cos pple complain the bubbles are not fine enuff.