A device used to maintain a hole formed in the ice for ice fishing. When placed over the hole, this invention forms a therm-protection between the hole and the surrounding harsh environment protecting the open water in the hole from crystallizing and ultimately freezing over. This device utilizes the natural temperature differences between the unfrozen water and the surrounding air and combines it with emitted radiation (naturally, electrically, chemically, or with petroleum-based products). Examples of this emitted radiation are the sun, a battery-powered heater, light source and a propane or similar type heater. An example of a chemical reaction device would be a hand warmer. Addition of any or all of the above will increase the efficiency of this invention. This device allows for adaptability to fishing conditions and fishing devices ranging from a simple rod and reel to complicated fish locators as well as a variety of tip-ups.