Algae stains on a glass mosaic outdoor table can be unsightly and difficult to remove. However, with the right techniques, you can restore your table's shine. Here’s a step-by-step guide to help you tackle this problem effectively.

1. Prepare a Cleaning Solution: Mix equal parts white vinegar and water in a spray bottle. Vinegar is a natural disinfectant that breaks down algae without damaging the glass. For tougher stains, add a small amount of baking soda to create a paste.

2. Apply the Solution: Spray the vinegar mixture onto the stained areas or apply the baking soda paste directly. Let it sit for 10-15 minutes to loosen the algae.

3. Scrub Gently: Use a soft-bristled brush or sponge to scrub the stains. Avoid abrasive tools that could scratch the glass mosaic.

4. Rinse Thoroughly: Rinse the table with clean water to remove any residue. A garden hose works well for outdoor tables.

5. Prevent Future Growth: To keep algae from returning, regularly clean your table and consider applying a sealant designed for outdoor mosaics.

For persistent stains, a commercial algae remover may be necessary, but always test it on a small area first. With these simple steps, your glass mosaic table will look as good as new!