Aquatic Essentials was Ocean Aquatics in store brand so you won't find any websites dedicated to them.
All calcium reactors work the same or at least I've yet to see one that was truly unique. This guide should work for you but if you want a hand getting it going I'm not busy and could come by today.
A Guide to Using Calcium Reactors
by Huntington, Simon
http://reefkeeping.com/issues/2002-0...ture/index.php
Here are the instructions for the up flow PM Ca Reactor as well:
http://bocup.bcsnv.servertrust.com/v...s/CRSeries.pdf
EDIT: I REALLY don't have anything to do today so I'd be happy to come by and BS about fish tank stuff.