Algae stains on a ceramic outdoor table can be unsightly and difficult to remove, but with the right approach, you can restore its original shine. Here are some effective methods to tackle algae buildup:

1. Vinegar Solution: Mix equal parts white vinegar and water in a spray bottle. Apply the solution to the stained areas and let it sit for 10-15 minutes. Scrub gently with a soft brush or sponge, then rinse thoroughly with water.

2. Baking Soda Paste: Create a paste using baking soda and water. Apply it to the algae stains and let it sit for 20-30 minutes. Scrub with a non-abrasive brush and rinse well.

3. Bleach Dilution: For tough stains, mix one part bleach with four parts water. Apply sparingly to the affected areas, wait 5-10 minutes, then scrub and rinse. Avoid overusing bleach to prevent damage.

4. Pressure Washing: If your table can withstand it, use a low-pressure setting to blast away algae. Keep the nozzle at a safe distance to avoid chipping the ceramic.

5. Preventive Measures: To avoid future algae growth, keep your table dry when not in use and apply a protective sealant designed for outdoor ceramics.

Regular maintenance and prompt cleaning will help keep your ceramic outdoor table algae-free and looking its best.