Fill each tank so the water finds its level · 27 levels · 6 tiers
Tap a cell to toggle water · long-press or right-click to mark X · water must be flat inside each tank · every row must match its clue
Nice work. The water has settled.
1. The grid is divided into tanks (cages) shown by thick borders.
2. Numbers on the left tell you how many water cells each row must have.
3. Inside each tank the water is flat: if a cell holds water, every cell of that tank below it is also water.
4. Tap a cell to fill/empty it. Long-press (or right-click) to mark a cell with X (definitely empty).
5. Match every row's clue to win.
A calm but deep logic puzzle. Here is the one rule that matters most: