We have been working hard on the project over the last days - frames are ready to be welded in place now - we are going to start that today.
The beds are nearly ready. The stone slabs are all cemented in place. One of them already has the brick wall around it. The big 4" pipes in the picture are the return pipes and are connected to the drain pipes in each grow bed through flexible hose.
The tank was a mess and it took two people a whole day to clean out.