When a packed ice block is placed adjacent, or a certain distance from water, it would freeze the water over. Ice farms have always been annoying as they need to be open to the sky and in snow biome, or high in the sky.

Does blue ice freeze water?

It could freeze them in a diamond shape, starting with the water sources right next to it. ...

Does packed ice melt?

The quick answer to this question is “No” the packed ice does not melt. Even if you place it near a heat or light source block. It is a solid block that will not melt.