If you're looking for a nice aquarium for your PC I highly recommend this one. It's a wonderful screen saver & if you buy the 3-in-1 you get 3 versions of what they sell separately for far less money. Each tank has many different things you can adjust. You get lots of cool fish to choose from & they interact with each other & swim around just like real fish do. The shark tank is also pretty cool. You can have the install put shortcuts on your desktop that let you turn your tank on instantly. Also included is the carousel. It's a feature that if you want, you can have the screen saver program choose randomly from any or all of your current savers besides the tanks. All tanks are easily adjusted to your liking by simply right clicking on your shortcuts & hitting "configure".
 

Experience the #1 selling screensaver of all time, Marine Aquarium, PLUS Goldfish Aquarium and Sharks. An amazing collection packed with stunning vibrance and detail.

System Requirements:

PC:
* Windows® 98SE/ME/2000 SP4/XP (Home or Professional) SP1***
* Pentium® class CPU (200 MHz or faster)
* 64 MB RAM (128 MB RAM for Windows XP)
* 15 MB free hard-disk space
* 4X CD-ROM drive or faster
* DirectX® 7 compatible 16 MB 3D accelerated video card
* DirectX 7 compatible sound card
* keyboard and mouse
* The latest drivers installed for your video card
* These are best found at the video card manufacturer’s website

Mac:
* Mac OS® X v10.2.8 or higher
* PowerPC G3 350 MHz (400 MHz G4 recommended)
* 10 MB free hard-disk space
* 128 MB RAM
* 4X CD-ROM drive or faster
* Open GL accelerated video card and drivers with 8MB VRAM (16 MB of VRAM for higher than 1024x768)
* 640x480 color display with 16-bit (thousands) color or better
* Standard Macintosh sound
* keyboard and mouse