Amazon has 160gal RC for $45. RC has a rebate for $10. Valid 1 per house hold.
Rebate form here: http://www.petsolutions.com/Images/Products/pdfs/160-Gal-Instant-Ocean-and-Reef-Rebate-2016.pdf
Rebate form here: http://www.petsolutions.com/Images/Products/pdfs/160-Gal-Instant-Ocean-and-Reef-Rebate-2016.pdf