So apparently the pump in my tank is either dieing or its just overly vocal on some days. I've checked the cadlight website and even emailed them and can't find a return pump for my tank or even what pump is actually on that tank. How do I go about finding out what pump it is and replacing it?? I want to get it replaced before I put fish in the tank (yet another damper in my plans to add fish next weekend).

Any Suggestions??