[rikki kimo]"Grow bounds is not effecting CC Mr Mercury on my solid layer."
o.k if anything, the grow bounds effect needs to be before the effect and not after. still it would not work since Grow bounds does not work in all cases. this is one of them - you are increasing the transparent area of the layer, but CC Mercury needs actual pixels to manipulate and finds none so there's the result - a cropped image.
an easy approach would be to use a tiler effect like motion tile - place it before cc mercury and increase the output width and height.