The sale seems to be different this time around. My local Petco ( Mount Vernon NY) and the one by my job ( Ramsey NJ ), their sales ad have the tanks at 50 % off. I checked one on Long Island ( Garden City ) and their ad says $1.00 a gallon. You can check the local ad online and see if it is $1.00 per gallon at your local Petco. $1.00 per gallon is the better deal because Petco's regular prices on tanks are ridiculous.