Looking good but if I may make a comment... does the paler bit of driftwood have to be there? To me it looks out of place as though it was an afterthought and detracts from the rest as it catches the eye. Might be just the reflection from the camera flash of course.
Is that Japanese rush you have at the right hand end? If so, it looks like it is planted a little too deeply (might just be the camera angle though). It is also not a true aquatic plant so won't survive
I love the driftwood at the left. Did you find it somewhere on a beach or river bank or is it not real?