I know we're not supposed to take too hot showers & baths, but what about heated pools? Our local pools have just started a new Hydro Chi class which I'd love to attend, but it's in the hydrotherapy pool. It's at the pool I worked at as a teacher (and taught in my first trimester but it was wintertime, so they hydro was welcome!), the temp only sits around 28-29 degrees, does anyone know for sure what temp is too hot?