Diving goggles are not allowed in the swimming pool because they are designed for use in deep water and can obstruct peripheral vision, increasing the risk of collisions with other swimmers. Additionally, diving goggles are not necessary for swimming laps or recreational swimming in a pool with clear water. The use of diving goggles in a swimming pool can also create a safety hazard if the wearer dives into shallow water thinking it is deeper than it actually is. **

To create a floor in the bathroom that looks like a sandy beach floor, you can start by choosing a light-colored tile or vinyl flooring that resembles sand. You can then add texture and depth by incorporating small pebbles or shells into the grout between the tiles. Additionally, you can use a clear epoxy resin to create a glossy, water-like effect on the floor, mimicking the appearance of water washing up on the shore. Finally, consider adding beach-themed decor such as driftwood, beach grass, or a beach-inspired shower curtain to complete the look. **

To remove limescale from the pool floor, you can use a mixture of equal parts water and white vinegar. Apply the solution to the affected areas and let it sit for a few minutes to loosen the limescale. Then, scrub the area with a pool brush or scrubbing pad to remove the limescale. Rinse the area thoroughly with clean water to remove any remaining vinegar solution. It's important to regularly maintain the pool's pH and alkalinity levels to prevent limescale buildup in the future. **

I believe the 2nd floor is a better option compared to the 1st floor. The 2nd floor usually offers better views, more privacy, and less noise from foot traffic. Additionally, being on the 2nd floor can provide an added sense of security as it is harder for intruders to access compared to the 1st floor. **

Using a diving mask instead of swimming goggles can provide a wider field of vision and better visibility underwater. Diving masks are designed to create a watertight seal around the eyes and nose, preventing water from entering. They also typically have a nose pocket for equalizing pressure while diving. However, diving masks may be bulkier and less streamlined than swimming goggles, which could affect comfort and performance while swimming laps. **

No, the ground floor is not on the 3rd floor. The ground floor is typically the first floor of a building, while the 3rd floor is two levels above the ground floor. Therefore, the ground floor and the 3rd floor are not the same. **

Swimmers don't move on the floor of the pool heater because the floor of the pool heater is typically covered with a layer of insulation and heating elements. This makes it unsafe and uncomfortable for swimmers to move on the floor. Additionally, the heating elements and insulation are designed to efficiently heat the water in the pool, and having swimmers on the floor could potentially damage the equipment. Therefore, it's best for swimmers to stay in the water and avoid the floor of the pool heater. **

In English, the term "first floor" is used to refer to the level above the ground floor. The term "second floor" is used to refer to the level above the first floor. Therefore, in English, "first floor" is used to describe the 1st floor. **