Hubbard
How to play Aquarium
- The numbers outside the grid tell you how many water cells belong in each row and column.
- Every outlined region is one aquarium with a single horizontal water level.
- Water fills from the bottom up. Cells at the same height in one aquarium always match, even when the region bends.
- Tap to cycle undecided, water and air. Select Water or Air to paint that mark, or right-click a cell to add air on a computer.
- Right-click and drag to paint air. When a row or column total turns green, tap its number to fill that line's remaining cells with air.
- You only need to place all the water. When every outside total is met, the remaining cells are treated as air and the puzzle completes.
Your first useful move
Start with empty or full row and column totals. Remember that connected cells at the same height in one tank share a water level, so one mark can settle several cells.
Playing on HubbardGames
Open a Library board to find this game’s controls. The how-to-play button keeps the rules close by while you solve, so you can check a detail without leaving the puzzle.
Choose your difficulty
The Library shows the available difficulty levels for this game. Choose a board that suits you, then return for another when you want more practice.
Can I practise without affecting the league?
Yes. Choose a puzzle from the Library to practise this game. Library practice does not add league points. You can return to an unfinished puzzle later.
