Ken
Not entirely clear what you are describing - water in the bilge which has partially frozen and is the color of pink antifreeze?If so, the pink residue may have come from whatever drained while winterinzing the water system? If so, this type antifreeze does not prevent freezing if diluted with water. If it is pure pink antifreeze in the bilge devoid of water, it typically crystalizes rather than form a solid upon freezing which may explain what you are seeing.If you stayed in the water, the bilge temp will be moderated by the ambient temp of the bay and not freeze too quickly even with the current cold spell.If you are concerned, drop a gallon of ethylene glycol antifreeze, which is intended to be diluted with water, in the bilge.