Seeing green algae coat your beautiful stone garden bench can be frustrating. Not only is it slippery and unsightly, but it can also degrade the stone over time. Don't worry—removing it is straightforward with the right approach. First, for a natural solution, mix equal parts white vinegar and water in a spray bottle. Generously apply it to the affected areas and let it sit for 15-20 minutes. The acetic acid breaks down the algae. Then, scrub vigorously with a stiff-bristled brush (not wire, to avoid scratching) and rinse thoroughly with a garden hose. For tougher infestations, a solution of oxygenated bleach (following package directions) is highly effective and stone-safe. Alternatively, a low-pressure power washer can blast away growth, but always test on a small area first and hold the nozzle at least 12 inches away to prevent etching the stone. To prevent future growth, ensure the bench is in a sunny, well-ventilated spot if possible. Applying a penetrating stone sealer once a year creates a water-resistant barrier, making it much harder for algae to take hold. Regular sweeping to remove damp leaves and debris also helps keep your bench clean and algae-free for seasons to come.
How do I get rid of green algae on my stone garden benches?
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