Jeff,
Good for you but as a pond ages one's chance of winterkill goes up if one does not do anything proactive. Just remember the snow is the white death, and you can still have some deep snow without the exceptional cold we had this winter. Depending on the age of the pond and depth of snow, oxygen problems can happen quicker than you think.
Last edited by Cecil Baird1; 04/12/14 09:59 PM.
