Why is it hazy? I was warming my son’s bath tonight . The water was perfectly clear (well, not perfectly, but you know) and as I added warm water it got all clouded.
WHY? I’ve wondered this for years.
Thanks.
The haziness is due to tiny air bubbles. The ability of a liquid to retain dissolved gasses is inversely proportional to its temperature. Adding hot water to cooler water causes some of the gases to come out of solution, hence the haziness.
In general, there are gasses dissolved in our water. However, all gas is less soluable at increased temps. Also, add to this the fact that, when moving through the pipes, the motion agitates the gas encouraging it to settle out (as bubbles) of the water. So, the cloudy nature of the water you’re witnessing is the gas escaping from the water as millions of tiny bubbles… - Jinx
Darn! Out-posted again! …Just like the short monster in Monsters, Inc - on the cover of the magazine, etc! - Jinx 
Hehehe…beat ya to it by a few milliseconds, Jinx.
Tiny Bubbles in the bath
make me happy, make me feel fine
tiny bubbles make me warm all over
with a feeling that I’m going to love you
till the end of time
Is this a record? Five replies but ony one answer?
Thanks people. Mystery solved.
No, there were TWO answers–both the same 