About Aquarium
Enter a moonlit hall of enchanted cisterns. Each irregular tank holds water at one flat level; the numbers along the edge say how many water cells lie in each row and column.
Tap a cell to mark water, dry or unknown. Water rises and settles as you make a mark, while glowing clues tell you which lines are full. Dry marks are optional, and Undo lets you reconsider without a penalty.
All 60 fixed boards are open, from the small first well to the eight-by-eight Moonwell Deep. Each is independently checked to have exactly one answer and can be reached by deduction alone. The first solve time of each board is saved, with a named public best and a Top 10 on the game page.
How to play
- Goal
- Mark water in the irregular tanks so every row and column reaches its shown total and each tank has one flat waterline.
- How it ends
- A board is won as soon as all water is correctly marked; there is no loss, and dry marks are optional.
- Record
- Your first solve time is kept for each board, and the fastest verified first solve appears beside the board and in the page trophy.
- A tank is a region inside thick borders. Its water is flat across a row and fills every lower row of that tank.
- The number beside a row or above a column says how many cells in that line must contain water.
- Tap to cycle unknown, water and dry; dry marks are optional. Mark every water cell to finish.
Controls
| Tap / click | Cycle a cell: unknown, water, dry |
|---|---|
| Right click | Cycle the other way |
| Drag | Paint the same mark across cells |
| Arrow keys | Move between cells |
| W / X / Delete | Mark water, dry, or clear the focused cell |
| Z / Escape | Undo or return to the chart |
The sixty boards are fixed, deducible and independently counted to one answer. No hint or answer key ships in the game. The timer begins when a board opens and never pauses; only a first solve can rank. Progress, sound and reduced-motion preference are kept in this browser.
