Flatworms

Was refitting part of a wooden edging path which surrounds the rear grass, I had placed several newspapers in the area where the path sits, as I needed to clear some soil out from the area, I was lifting the papers and discovered 3 flatworms below the paper, I thought I had got rid of this pest, as while doing other work I came across lots of worms, the paths surround the flower beds and the worms I mentioned were in the veg beds, though diffrent areas the garden isn't that big, so still inclined to think the addition of seaweed makes a difference as the veg beds had seaweed placed over them where the flower beds didn't, so think I will be collecting some seaweed tomorrow.