Kay, I ask in innocence: what happens when a lake gets a thick enough crust of ice to allow ice fishing, and the erection of protective "huts" on top...? When this breaks up, doesn't it have the very same potential of screwing up the oxygen content within the lake..? I don't understand the scientific facts which say that snow and ice lower or raise the oxygen content. Isn't ice still 1 hydrogen molecule and 2 oxygen molecules, just like water? So is steam out of the kettle... It's all the identical compound with simply a different characteristic under the influence of temperature. Would it matter if the body of water were as big as the Atlantic Ocean? Can you please explain? Penny, NY ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866]