I bought an aquaclear filter yesterday and one of the justifications for paying more than I would on amazon was that it has a thing on it for a free 6 foam inserts and 12 carbon inserts. (1 year supply). So, the required things seem to be the receipt for the filter and the upc code from the filter. Plus the receipt(s) and ups codes from a years worth of inserts you bought. (correct me if Im wrong). So does that mean I need to buy a year of inserts first? the offer stands until 2013 so I think they mean for you to have bought a year of supplies by then. So, would there be anything wrong with me buying a a year of carbon and a year of foam all at once and saving them until needed? I know there isnt anything wrong with the foam, but does the carbon go bad or anything if it is kept in the bag in the box? My understanding is it is "activated" when it is rinsed in water. I have a few coupons and there is a sale on the stuff so now would be the time to buy at least some of it.