The three water gardens we put in a few years ago are doing really well. In the one that is lower to the ground, we have frogs and toads using it and singing happily on various nights. The little minnow-type fish all also happy and multiplying in all three water gardens, keeping them clear of nasty mosquito larva. I also have one open 55-gallon drum that catches water from a leaky rain gutter that I have also put those little fish in and they are working hard in there too.
Head over to Not Dabbling in Normal to read the rest of my post.