Regarding noisy pumps..... Just found this.... We are not alone...

http://www.zalmanforums.com/showthread.php?t=48

I've got the same problem. My Zalman Reserator lasted all of about 3 months before the pump started getting really noisy. I've taken th pump out, and ran it separately in a bowl of water and it was making the same noise. It is caused by the internal propeller vibrating. My theory is that the pump is...