First winter with our in-ground saltwater gunite pool, and we opted not to close it due to our southern location. Freeze protect has been kicking on for a few nights over the last week or so, but we are supposed to have a hard freeze tonight and this weekend as well (low should be 18 degrees overnight). My main question is this: we have three pool spitters that are run underground and come out in the concrete coping - should we turn the them on so that when the pump comes on water will periodically run through the lines or leave them off. Not sure what kind of risk we would be taking either way. The buried pipes should be okay, but I worry about the point where it come up towards the surface and through the concrete???? Any feedback on this would be appreciated!!!