These days of sun and heat, children spend much of the day in the water, both at sea and in the pool. Some are older and they are clear that you have to pee before entering the water. Others, on the other hand, do not control when they are going to do it and are more dangerous, because they may well piss in the middle of the water, in the arms of their parents.
There is not much problem with the elderly, and there are also many parents who explain their children, with the intention that they do not go through their heads, that if they do it in the pool a red or blue (or green) circle will appear around them and that everyone will see that they have peed. But of course, if the baby is small and the decision does not depend on him or the parents, many suffer thinking that at any time, in that municipal pool to which they have gone for the first time, their baby will appear surrounded by the incriminating stain.
It is true? Will a red or blue circle appear around your child if the pee escapes in the pool?
I've seen it in movies and even on posters of some pool
Everyone has seen Torrente in the pool or some movie in which it happens. The protagonist pisses, and well, it is not that a red circle comes out around the swimsuit, that would be almost magic, is that the urine, upon contact with a chemical that is in the water, acquires color.
There are even pools in which some posters warn of the presence of said product so that users are clear that, in case they decide to relax their sphincter, the rest of the people will have free access to laugh at their expense. This sign you see above, for example, can be seen in the pool of a Hotel in Greece and says "Warning: this pool is equipped with a Urine Detector".
However, it does not exist
I'm sorry, I know you've seen it in the movies, I know there are posters that warn about it and I know that you know a friend who tells you that a few days ago it happened to an acquaintance in a pool in his city, but no, your child will not be surrounded by a pee colored in any color, so, if it escapes, bad luck, the pool will be a little dirtier, but quiet, nobody will notice. In fact, even Phelps said in an interview that everyone urinates in the pool, which I say will refer to swimmers, who spend hours in the pool.
But could it exist?
Yes, it could exist. You just need to make a chemical compound that manages to color human urine ... the problem is that you only have to act in the urine, and that is the difficult thing. Reportedly, copper sulfate in large quantities reacts with the acid and creates a blue spot. That large amount needed would make any pool user go out with the swimsuit and bluish hair, and I don't know how much that would be desirable for pool owners.
