Kay, I would shut the aerator off and let the hole freeze clear,You have some zero temps coming tonight and to pump that cold of water to the bottom will do more harm to fish than the small amount of air you will supply.You should have plenty of o2 for now. It will warm up some Monday or Tue and you can turn the system back on long enough to reopen the ice if you want.I usually figure I can melt about 4 inches of ice per day with a good system.By first of the week you may have 2 inches of new ice,Its no big deal if it takes longer.You did not mention if fish were a concern but since you are running your system I assume they are.Is there a reason you are running your3 24/7 in that size pond? Ted
