Printable Aquarium puzzles, ready for pencil.
Each pack is a black-and-white booklet of Aquarium logic puzzles, with the answer key starting on its own page. Puzzle pages show the tanks and the outside numbers. Answer pages fill each water cell and leave empty cells blank. Crosses are not printed.
- 15 free packs
- 6×6 · 7×7 · 8×8 · 10×10 · 12×12
- Answer key included
- No sign-up
- A4
- A4
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Build your own pack
Mix sizes and difficulties in one PDF: a few easy 6×6 warm-ups, then hard 10×10 grids, or print-only 12×12 medium and hard. Up to 100 puzzles, answers included.
- Up to 6 sections
- A4 or US Letter
- Made in your browser
Sections
1 / 6Each section adds puzzles of one size and difficulty, in order.
4 pages: 2 of puzzles, 2 of answers
Your page preview lands here
Press Generate to build 8 puzzles in your browser. Nothing is uploaded, and you can page through every puzzle and answer page here before you download.
How does the pack builder work?
Everything happens on your device. When you press Generate, your browser creates each Aquarium grid from the pack seed, solves it to make the answer key, and lays the pages out as a PDF. Nothing is uploaded and there is no account. Four 6×6 or 7×7 grids share a sheet, and two 8×8 or 10×10 grids share a sheet. A 12×12 grid has the sheet to itself. Tick Large print if you want one big grid per page. 6×6 through 10×10 come in easy, medium, and hard. 12×12 is medium and hard only. Each puzzle prints with its number and seed, so answers line up even when you keep them in a separate PDF. The same seed and settings always give the same puzzles. Use Copy share link to send a class or a friend the exact same pack, or press shuffle for a fresh set.
Want Aquarium next to Sudoku in one PDF? Build a mixed pack.
Just want one grid?
Open Aquarium, choose a size and difficulty, then press Print. You get a single clean sheet of that puzzle.
- 1
Download
Pick a size and difficulty. Every file is a small A4 PDF.
- 2
Print in black & white
6×6 fits four to a page, 7×7 fits four to a page, 8×8 fits two to a page, 10×10 fits two to a page, 12×12 gets a page each.
- 3
Check the answers
The answer key starts on its own page, so you won’t spoil the next puzzle.
About these Aquarium packs
Print an Aquarium logic puzzle pack and solve it with a pencil. The board is split into tanks. Thick lines are the tank walls. Thin lines are the cells inside a tank. Numbers above the grid are how many water cells sit in each column. Numbers to the left are how many water cells sit in each row. A blank slot is not a zero: that line has no fixed count. A printed 0 means the whole line stays empty. Water in a tank has one level. Every cell in a wet row of that tank is water, the wet rows sit on the bottom of the tank, and nothing floats above an empty cell in the same tank. A cross is a mark for a cell you already know is empty. The answer key fills the water and does not print crosses. Each file is a black-and-white booklet. Puzzle pages show the tanks and the outside numbers. The answer key starts on its own page. Packs cover 6×6, 7×7, 8×8, and 10×10 at easy, medium, and hard, plus print-only 12×12 medium and hard. A 6×6 or 7×7 sheet holds four puzzles. An 8×8 or 10×10 sheet holds two. A 12×12 sheet holds one. Tick Large print for one big grid per page. Seeds are fixed, so the same download always has the same grids. Each single pack has eight puzzles, and the starter pack has one puzzle from each band. To try one grid on screen first, open Aquarium and use Print or Download PDF there.