What is worse than peeing in a pool?

I'll tell you. Puking in a pool. They make signs for not peeing, such as "Welcome to our ool, notice there is no P in it and we would like to keep it that way." I haven't seen a sign for no vomiting in our pool. I could see how such a sign might pose difficulties for the sign industry. There is no V in pool, and really not a way to play on words. You can't exactly say, Welcome to our Pool, notice there is no vomit in it. Just doesn't make sense.
Even if there were a sign for such a thing, it wouldn't matter. My four year old daughter cannot read. It's okay, it's a normal thing for a four year old not to read. Anyway, the pool I am referring to is a pool at a local school in which she is taking "lessons". Lessons is a very loose word because basically the kids do whatever they want and the teacher floats around watching and making "suggestions." Suggestions is also used loosely because in the 45 minute time frame she usually makes one "suggestion" and never stops back to see how it goes.
My daughter is a fish. Not literally, so stop imagining it and stay with me on this story. She can swim a long ways and is very good at it. But her downfall is she doesn't quite understand the breathing part of swimming and because she is so excited to be in a pool in the winter, she doesn't care. Now, I know the breathing part will come with age and experience, but at her age when she tries to breathe she takes in water. Doing this once, probably not a big deal, the PH on her urine might be a little off the next time she goes to the bathroom. However, doing it every time she swims through the water becomes a problem.
How much water does it take? Who knows. I wouldn't even know how to, or want to measure it. What does too much water look like? Vomit. In the pool, not even on the side. Containment just wasn't happening, no matter how much I tried to keep it all in my hands.
We cleared the pool and ended the lesson early, which was okay with me. You can only spend so long floating around in water as warm as, and probably full of, pee. We left in shame, and a little bit of joy, as this was the last lesson and we had gotten done early.