Posted: 25/05/2014 at 10:42
I think it needs a bit more height at some point, maybe merging in to the high point of the pond. See if you can get the strata of the rocks to be all on one plane, not necessarily horizontal.
You could balance it with a bit less height somewhere else, just merge into the surrounds.
Some paving of some sort round it would make it look less of an island and avoid the forthcoming problems with encroachment of grass