I made a mistake in levelling the two tanks, resulting in wasted water storage capacity. Here’s how Lon and myself fixed it.
A modification to the DIY first flush diverters means that we can store more water in a big downpour.
It was a bit of effort but the girls have a new house. Its steel and roofed and safe from predators and weather. The most important thing though is that the garden is safe from the girls!