Aquarium

Easy Aquarium — what to expect

Easy Aquarium uses 6×6 grids with 4 to 6 aquariums. Most cells can be resolved by checking row and column clue counts alone. When a clue is 0, empty the whole line. When a clue matches the grid size, fill the whole line. The water-level rule rarely causes trouble at this size because the aquariums are small and regular.