My Nan & Grandad have an old pond that mesures about 2x1m and this summer has seen it become very overgrown with lillies and dirt.

The pond has no filters / pumps etc and so one end has become thick with all mannor of nasty stuff (the same end where the lilly roots are).

What I would like to know is what would be the best way to approach cleaning it out and removing some of the (far too many) lilly pads that are in there - without diturbing the 4 goldfish too much!

Many thanks in advance.