Having topped up the river with realistic water I had a nasty surprise. The realistic water reacted with water effects to create a nasty , white , pva splodgy mess. I had to cut out 4 layers of set realistic water and start again. Let this be a warning to you ! It's fine when applied on top of, but obviously not when it's underneath. It did however , give me a chance to re do the river banks and alter the river bed slightly . Here's the (very nearly) finished mk 2 version.