To apply a new waterproofing membrane on top of an old bitumen waterproofing membrane, the surface of the old membrane should be thoroughly cleaned and prepared. Any loose debris, dirt, or old adhesive should be removed to ensure proper adhesion of the new membrane. Once the surface is clean, a primer should be applied to promote adhesion between the old and new membranes. Finally, the new waterproofing membrane can be installed according to the manufacturer's instructions, ensuring that it is properly sealed and bonded to the old membrane to provide effective waterproofing. **

The green coating in the pond is most likely algae. Algae are tiny, plant-like organisms that can grow rapidly in bodies of water, especially when there is an abundance of nutrients like sunlight and phosphorus. This overgrowth of algae can create a green, slimy coating on the surface of the water, which is not only unsightly but can also harm the ecosystem by depleting oxygen levels and blocking sunlight from reaching other aquatic plants. **

The brown green coating on plants is likely algae or moss. Algae is a simple, non-flowering plant that can grow on the surface of plants, especially in damp and shady conditions. Moss is a small, non-vascular plant that can also grow on the surface of plants, particularly in moist and shaded environments. Both algae and moss can compete with the plants for sunlight and nutrients, potentially harming the health of the plants if left unchecked. **

A utility knife or a sharp blade is typically used to cut the waterproofing membrane. It is important to use a sharp tool to ensure clean and precise cuts, which will help in achieving a proper seal and prevent water leakage. Care should be taken to avoid damaging the underlying surface while cutting the membrane. **

Green is green because it is the color that our eyes perceive when they detect light with a wavelength of around 520-570 nanometers. This wavelength falls within the visible spectrum of light, and when it is detected by the cones in our eyes, our brain interprets it as the color green. Objects appear green when they reflect or emit light in this specific wavelength range, which is why we perceive them as green. **

Ideally, the waterproofing membrane should be applied in dry weather to ensure proper adhesion and effectiveness. If the membrane is applied and then it rains before it has fully cured, it can compromise its ability to create a watertight seal. Water exposure during the curing process can lead to delamination, reduced adhesion, and potential leaks. Therefore, it is best to apply the waterproofing membrane when there is no rain in the forecast and allow it to fully cure before any water exposure. **

A blue-green coating on a shower hose would likely appear as a thin layer of blue-green discoloration or buildup on the surface of the hose. It may give the hose a slightly mottled or uneven appearance, and could potentially make the hose look dirty or aged. This type of coating is often a sign of mineral deposits or algae growth, and may indicate the need for cleaning or maintenance to remove the discoloration and restore the hose to its original appearance. **

The optimal green for a green screen is a shade of green that is bright and vibrant, but not too neon or artificial looking. A mid-tone green, such as chroma key green (#00FF00), is commonly used because it is easy to key out and provides good contrast with most subjects. It is important to choose a green that does not match the colors in the foreground subject or any props, as this can cause issues with the keying process. Ultimately, the best green for a green screen will depend on the specific lighting conditions and camera settings being used. **