Try the desktop aquarium free. The demo opens the tropical tank: collect and breed its first two tiers of real fish, aquascape it your way, and run the click-through overlay while you work. No clock, no pressure — and your whole tank carries straight into the full game.

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About This Demo

Nanoquarium is a real aquarium that lives on your desktop — and this demo is a real slice of
it, with no time limit.

In the demo:
  • The warm tropical community tank — buy, keep and breed its first two tiers of real-world fish
  • Full aquascaping — substrate, plants, wood and stone, backgrounds, saved looks
  • Every display mode, including the click-through desktop overlay — the fish swim over your apps while your clicks pass straight through to your work (the overlay is Windows-only; Linux / Steam Deck run the tank as a window)
  • No clock and no fail state: feed it between emails, come back to fry you never saw coming

Your tank carries over. The first time the full game starts on the PC where you played the
demo, it picks up your tank — every fish you've bred, every coin you've earned and every scape you've
built is waiting for you, with the fishroom's other starter tanks ready beside it.

The full game adds: the coldwater pond and saltwater reef biomes, the rare
tier-3 and tier-4 showpiece fish, a whole fishroom of up to ten tanks, Creative mode
and 59 Steam achievements.

System Requirements

Windows
SteamOS + Linux
    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 11 (64-bit)
    • Processor: x64 CPU with AVX2 — Intel 4th-gen Core (Haswell, 2013) or AMD Ryzen (Zen, 2017) or newer
    • Memory: 150 MB RAM
    • Graphics: Any — software-rendered, no GPU required
    • Storage: 50 MB available space
    • Sound Card: Any
    Recommended:
    • Requires a 64-bit processor and operating system
    • OS: Windows 11 (64-bit)
    • Processor: Any recent multi-core x64 CPU
    • Memory: 300 MB RAM
    • Graphics: Any — software-rendered, no GPU required
    • Storage: 50 MB available space
    • Sound Card: Any
    Minimum:
    • OS: A modern 64-bit glibc Linux — SteamOS 3+ / Ubuntu 22.04+ (or equivalent)
    • Processor: x64 CPU with AVX2 — Intel 4th-gen Core (Haswell, 2013) or AMD Ryzen (Zen, 2017) or newer
    • Memory: 150 MB RAM
    • Graphics: Any — software-rendered, no GPU required
    • Storage: 50 MB available space
    • Sound Card: Any
    • Additional Notes: The click-through desktop OVERLAY + the system-tray icon are Windows-only
    Recommended:
    • OS: SteamOS 3+ / a current distro
    • Processor: Any recent multi-core x64 CPU
    • Memory: 300 MB RAM
    • Graphics: Any — software-rendered, no GPU required
    • Storage: 50 MB available space
    • Sound Card: Any
    • Additional Notes: The click-through desktop OVERLAY + the system-tray icon are Windows-only
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