This morning the city council employees helped us in setting up the water filling process. As usual, people are extremely professional here, and everything went perfectly fine. What we are doing now is a partial filling (of about 1m of depth), so that we can test a couple of different photomultiplier configurations. When we are finished with these first tests in water, we will complete the water filling of the tanks, and this will be on Wednesday next week. It will take about 4 hours to fill the two tanks in this first partial filling step.
The first picture shows the hose arriving at the top tap, as we are filling from the top in this first step.
This picture shows the water going inside the tanks, and (luckily) not hitting the photomultiplier.