Hello,
the pond will be built right at the edge of the property so that it will only be accessible from two sides, but you know kids, they don't pay attention to things like that. Honestly, I'm less worried about the neighbors' children; if they're old enough to climb over my fence, then they can also swim.
I find the idea of the grille completely absurd, especially since, as the name suggests, I want to swim in it. I've also thought about a tarp, but that doesn't work with the plants growing in and around the pond.
However, yesterday I read about an alarm device that emits a signal tone when something falls into the water, so at least you don't have to constantly watch to see if a child is playing at the water's edge. I wanted to ask the pond builder what he thinks about it; what do you think, does such a device make sense?