And yes this is very similar to the previous post yet it an emphasises an important point. It is similar yet it is not the same. It was based on a photo taken a few seconds later. And water is so … well fluid 🙂  so the image is constantly changing. So, if you have a digital camera then get a large memory card then if you spot something interesting then take lots. Even if it’s not water then slightly different exposures, shutter speeds, framing etc all create potential variation. Have fun.