First year pool owner, in Illinois where it gets very cold. We were so methodical about winterizing the pool, but unfortunately we forgot the pool thermometer was never removed from the pool, dah! We have the winter cover on, wrapped it in that saran wrap type plastic to protect from the wind and then realize the thermometer is still in the pool. It was a cheap thermometer hanging on a rope. Although I looked at it daily, I don't know if it is plastic or glass, guessing plastic, purchased for about $8 to $12 at local pool store. We believe at least part of it is in the water. A friend thinks the worst that will happen is it will crack but not burst glass (if it is glass) fragments into water. I have no idea what is in the thermometer to register the temp.
Can anyone weigh in on this, do we need to remove the thermometer? Thanks