I've disconnected two of my downspouts from the sanitary system and directed them to the micro-basins. Saturday (June 17th) night's storm was the first test of the all four basins with downspout water. And it performed well! Pictured is the bottom basin (Basin 4) at the height of the storm. It's not even a quarter full. The other true test was the speed it infiltrated the ground. And when I checked about twenty minutes after the storm, there was no water in any of the basins! Sunday afternoon (June 18th) storm was interesting because the rain barrel was full. All the water passed through the overflow and down into the basins (3 &4). Still no issues, but I think I'll need a splash plate for the overflow or a pipe to get the water down to the basin with less force.
