The sandbags are to hold the liner in place until the water can come up to that level and do the job itself.
Also the Fastlane has been installed
Michelle has some concerns about the liner color, but you can already see how it changes as the water is added.
Here is a nice overview shot from the sheltered part of the patio.
The screens in all these pictures look blurry because it’s actually pouring rain as I take these shots.