Details: Offer valid on orders with a qualifying merchandise total through Monday, December 18, 2017 @ 11:59 pm [CT]. Use Promo Code during Checkout to claim your gift certificate. One gift certificate per household. Not valid in combination with any other offers. Gift certificate will be emailed to qualifying customers after order has been shipped and will expire 30 days from date of issue. Excludes items with manufacturer-set pricing, including brands: AquaIllumination, EcoTech Marine, Neptune, Reef Octopus, Coralvue, Coral Rx, Red Sea, Giesemann, Maxspect, Icecap, OASE, Matala, MVP, Back on Track, WeatherBeeta, Kensington, Horsewear Ireland Rambo, Oxbow, and Lafeber's.