Star moss and gold moss are not toxic to Greek tortoises. In fact, moss can be a safe and nutritious addition to a Greek tortoise's diet when offered in moderation. However, it is important to ensure that the moss has not been treated with any chemicals or pesticides that could be harmful to the tortoise. It is always best to consult with a veterinarian or reptile specialist before introducing any new plants or mosses into a tortoise's enclosure. **

It is generally not necessary to remove moss from trees unless it is causing harm to the tree. Moss on trees can actually be beneficial as it can provide insulation, retain moisture, and create habitat for insects and other organisms. However, if the moss is covering a large portion of the tree and blocking sunlight, or if it is contributing to excess moisture which can lead to disease or decay, then it may be necessary to remove it. It is important to assess the situation on a case-by-case basis and consult with a professional arborist if you are unsure. **

To remove moss from the lawn, you can start by manually raking or using a dethatching tool to loosen and remove the moss. After that, you can aerate the lawn to improve drainage and reduce moisture, which moss thrives in. Applying a moss killer or a mixture of water and dish soap can also help to eliminate moss. Finally, overseeding the lawn with grass seed can help to fill in the bare spots left behind by the moss. **

To remove moss from stone joints, you can start by manually scraping off as much moss as possible using a stiff brush or a putty knife. Then, you can apply a moss-killing solution or a mixture of water and vinegar to the affected areas and let it sit for a while. After that, you can use a pressure washer to rinse off the remaining moss and debris. Finally, you can reapply the moss-killing solution to prevent regrowth. **

To remove moss from concrete paving stones, you can start by manually scraping off as much moss as possible using a stiff brush or scraper. Then, you can apply a moss-killing solution or a mixture of water and white vinegar to the affected areas and let it sit for a few hours. After that, scrub the area again with a brush and rinse it off with water. You can also consider using a pressure washer to remove any remaining moss and dirt from the concrete paving stones. Finally, to prevent moss from growing back, you can apply a moss inhibitor or sealant to the cleaned area. **

Yes, moss balls, also known as Marimo balls, are able to float in water. Their buoyancy allows them to move around the water's surface, making them a unique and interesting addition to aquariums or decorative water features. Moss balls are able to float due to their round shape and the air trapped inside them, which helps them stay afloat. **

To remove moss and mildew stains from cotton, you can start by mixing equal parts of white vinegar and water in a spray bottle and spraying it directly onto the stained area. Let it sit for about 15-20 minutes before scrubbing the area with a brush or cloth. Then, wash the cotton fabric in the washing machine with a detergent and warm water. If the stain persists, you can also try using a mixture of hydrogen peroxide and water or a commercial stain remover specifically designed for mildew stains. **

To remove moss and algae from paving stones, you can start by manually scraping off as much of the growth as possible using a stiff brush or scraper. Next, you can apply a solution of water and white vinegar or a commercial moss and algae remover, following the manufacturer's instructions. Let the solution sit for a while to break down the growth, then scrub the area again and rinse with water. To prevent future growth, consider improving drainage in the area, trimming nearby vegetation to allow more sunlight, or applying a sealant to the paving stones. **