Whilst original Insaniquarium was based on PopCap's simple webgame, Insaniquarium Deluxe is based on PopCap's later, and much more fully featured PC game, with shinier graphics, more game modes, more unlockable pets, and more challenging aliens than the original. Astraware will be releasing the game on Wednesday August 6th 2008. Insaniquarium Deluxe supports a wider range of resolutions and devices than its predecessor, but to avoid confusion, it's not an update and registration codes for the original will not work with Insaniquarium Deluxe.
Here is more info on the game:
Insaniquarium Deluxe is the craziest aquarium game ever - tend to your fish and keep them happy and they'll reward you with precious coins and jewels. Use the money you earn to buy upgrades for your tank or egg parts which hatch lots of different in-tank pets with special powers. These pets can help you feed your fish, collect coins, or even protect against the aliens that will invade your tank and wreak havoc. You can also use the money you earn to buy better weapons to see the aliens off quicker!