Zen Aquarium

Idle aquarium simulation with growing fish populations and no upkeep

Astro Cat · Released Sep 25, 2025

Reviews: Very Positive; 94% of 305
Recent reviews: Not enough recent
Players: 5; daily peak, Oct 28, 2026
Steam Deck: Playable
Last update on Steam: 10 months ago; Dec 16, 2025
Minimum PC: GeForce GTX 680; 4 GB RAM · 1 GB disk; Full requirements

What is Zen Aquarium?

Zen Aquarium is a single-player virtual fish tank inspired by classic aquarium screensavers. You watch fish swim and combine music with ambient sounds such as rainfall, wind, and cat purring.

For you if...

+you want a quiet backdrop for work or study

Not for you if...

−you want hands-on fish care and aquarium management

What players say

94% of 305 reviews are positive

Players praise the fish animations and adjustable soundscapes. The main complaints concern limited tank customization and the lack of fish interaction, with some players also wanting a wider variety of species.

Screenshots and trailer

Zen Aquarium system requirements

Minimum: GeForce GTX 680, 4 GB RAM, 1 GB of disk space.

As published by the developer.

Can my PC run Zen Aquarium?

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Minimum

OS: Windows 10 (64-bit)
Processor: Intel Core i3-6100 or AMD Ryzen 3 1200
Graphics: NVIDIA GeForce GTX 680 or AMD Radeon HD 7970
Memory: 4 GB RAM
Storage: 1 GB available space
Notes: Zen Aquarium does not support ultrawide resolutions (21:9, 32:9)

Does Zen Aquarium have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Zen Aquarium run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

Default controller config not fully functional
Sometimes shows mouse, keyboard or non-Deck controller icons
Some text entry requires manually opening the on-screen keyboard
Some in-game text is small and may be hard to read
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows, macOS
Achievements: 15
Steam features: Family Sharing
Languages: Text only: English, French, German, Japanese, Korean, Polish, Portuguese - Brazil, Portuguese - Portugal, Russian, Simplified Chinese, Spanish - Latin America, Turkish.

Does Zen Aquarium use AI-generated content?

Steam's data marks it as containing AI-generated content, but its Steam page had no statement from the developers when we checked it.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam