And, at least around here, you can get store credit without a receipt on items stocked at petsmart. I just returned a bottle of stress zyme and a bottle of stress coat which I'd lost the receipts for; Funded my incandescent hood w/ 13w daylight spiral cfl's 
Edit; Worth noting that it doesn't matter if the product is used(including chemicals, food, etc), my bottles were partly empty, and a while ago I returned a topfin filter that had been used about 2 weeks.
Edit; Worth noting that it doesn't matter if the product is used(including chemicals, food, etc), my bottles were partly empty, and a while ago I returned a topfin filter that had been used about 2 weeks.
