Do you have a diffuser system in the pond that has been shut down? I've actually broken some ice and pulled one of the lines and diffusers in close to shore and cranked that one up. In fact just did it in my trout pond several days ago. Opens the ice right up above the diffuser.
BTW it takes time before oxygen is used up in the pond unless your pond is extremely weedy.
Last edited by Cecil Baird1; 12/15/13 04:19 AM.