I just checked the logic and added an item from the Reef2Reef sale and that Mega Mystery Box. It allowed me to use the discount... However, the mega mystery box you have is not part of the Reef2Reef Sale so it will not discount that item.Will do.
Also that coupon code did not work, I kept getting an error when I placed the order.
I don't know if this is still an issue but when I was checking out last night "TEACHERSPET" (all caps) would not work but "teacherspet" (all lower case) did work. So if anyone is having issues that could be why.
After Sale is still going on!
Save an extra 10% OFF all remaining corals!
Use Code: TEACHERSPET