Thanks for the reply, Roger. In reviewing my order histories I found that in fact I bought the two pumps and the controller in July 2011, which fits better with my recall and with our discussion about their use (
http://www.reefcentral.com/forums/sh....php?t=2046599). I had previously purchased a single 6055 in April 2010 but returned it because I did not have the controller at that time.
I don't know if I have the original receipt but I will print out the order invoice with documentation of payment from the order history at the vendor's website. Hopefully that will suffice.
Robert