Recently my Emperor 400 has been making a grinding noise from the impellar housing so i e-mailed Marineland telling them the problem. Not thinking i would get a reply i was shocked that within 6 hours they had replied saying they would send me a replacement impellar free of charge.
As i was replying back with my details i decided to ask the cost for a replacement impellar for my 350b and new sponge for 660r. The reply i got was "No problem, we will send you all 3 items out free of charge"
He also told me to put a blob of vaseline on the impellar in future and that will make it more silent. I have to say i was very impressed with the customer service and wanted to share it with you guys.