I'm pretty sure this is the week for the sale. Last year I purchased 2 tanks for my sump and fuge. The deal was on any rectangular tank up to 55 gallons for $1 a gallon. Call you local store to find out if they are participating.
I did a freight pickup from one in Bellevue today and the manager said that corp hasn't given the dates as of yet. But she did say this is the time of year it normaly happens.