Keycodes and CDs will not work between the separate Marine Aquarium series (.99, 1.0, 2.0, 2.6, etc.). In order to prevent piracy, we modify the keycode system for each new release of Marine Aquarium. If you wish to use a new version of Marine Aquarium, and you have an old keycode, you will have to acquire an upgraded keycode.
The only exception to this is v2.5 CD's which will unlock v2.6 download for free.
For more information on upgrading, please click HERE
Lastly, keycodes that we find posted on the Internet are automatically deactivated in our database. You are urged to NEVER give out your keycode to anyone. If you do, they might post YOUR keycode to a website or forum. At that point we will be forced to disable the keycode. We ONLY disable keycodes that are posted to the Internet, or from customers that could not get the product to work on their computer. UNDER NO CIRCUMSTANCES CAN WE "RE-ACTIVATE" A KEYCODE. We apologize for any inconvenience.