During recent record cold temperatures if for some reason your pond completely freezes over and you are tempted to break the ice, don’t do it! Physically breaking the ice causes reverberations within the pond stressing pond fish. If you need to reopen a small hole in the pond, use a thick bottomed pot filled with boiling hot water. Placing it on the pond will gently melt the ice below reopening a degassing hole. The hole doesn't need to be large. About 12 inches in diameter is usually sufficient. If you notice the fish braving the colder waters to swim near the hole, this means not enough oxygen is in the lower levels. The hole needs to be bigger. We recommend the use of an aerator and / or pond heater to prevent the pond from completely freezing over. If you have any questions about your pond/pond fish please feel free to call us at 814-696-1920 or drop in for some free coffee! We are here to help!