Only the top layer of water needs to cool to the freezing point.

A thin layer of water would then be added for the fresh ice.

I have read they are open water layers, so what type of stones do I need?

Pour on a thin layer of water with food coloring in it.

They were still under a shallow layer of water.

In that situation it will form a layer over the water layer.

The sun itself, though removed through layers of water and sky, might incoherently be seen here.

Fresh water layers have been observed to spread through the Sound at 0.9 metres per second.

This is also good for fly life in the coming season, all those eggs are now safely under a protecting layer of water.

But the solution is simple: keep a thin layer of water in the roasting pan.