Maintaining the hole in the ice in Winter swimming

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• One manner that the hollow is maintained at everyday ice swimming places is with a pump that forces the water to flow into under the hollow, stopping ice from forming. Small ice-holes also can be saved open via keeping a lid/top over the hollow to prevent ice forming.

• Most ice swimming places additionally use a selected heated "carpet" going from the locker rooms to the ice-hole, each to make taking walks to the hole greater first-rate and for safety as otherwise the water dripping from returning swimmers could freeze and create a dangerously slippery surface to walk on.