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Pool problem WSJ Crossword Clue

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Frequently Asked Questions About This Clue

The most common and recent 5-letter answer for "Pool problem" is ALGAE.
The clue 'Pool problem' refers to an issue commonly encountered in swimming pools, where algae growth can turn the water green and make it unsafe for swimming. 'Algae' is a type of aquatic plant that thrives in warm, stagnant water, often requiring chemical treatment to remove.
This clue was last seen in the WSJ Crossword on September 26, 2026.
Algae are simple non-flowering plants that grow in water and damp environments.
Bottom of the aquatic food chain, Pond problem, Green gunk in a fish tank, Gunk in an aquarium, growth in the fish tank

The clue “Pool problem” is a classic crossword staple, frequently appearing in puzzles like the WSJ crossword. For the puzzle dated September 26 2026, the definitive 5-letter answer is: ALGAE.

Expert Tip: When you’re stuck, try to analyze the structure of the clue itself. Is it a direct definition, a pun, a fill-in-the-blank, or a pop culture reference? Identifying the type of clue you’re dealing with is a key skill for improving your solving speed.