Sorry but I guess i'm kinda hijacking this thread. This is what one of my Vortechs sounds like, the one that was replaced on warranty sounded like this. I took this off of the other site and the owner was told to contact Ecotech. 3 pumps and 2 have sounded this way. Maybe I got ones from a bad batch.
My reason for replacing the bearings myself is due to time it takes for Canadian customers to get warranty work. The ones I will be replacing are in a used pump that I bought from a fellow canreefer so no receipt.
http://www.youtube.com/watch?v=6JdobfMnfa8