How the Gizzmo works
skimmer
Every pool has a skimmer.		 When water freezes, it expands.
When water freezes it expands.
The expansion breaks the skimmer
The expansion breaks the skimmer.		 The Gizzmo absorbs the expansion
The Gizzmo absorbs the expansion.
The water crushes the Gizzmo instead of the skimmer.
The water crushes the gizzmo instead of the skimmer.