I've been using Dimension for several years now (actually Lesco Lifeguard last year) and really like that it doesn't stain. I would never use Pendi on my residentials for fear of staining the walks and drives. However, I have been reading about the good residual of Prodiamine (Barricade and Stonewall) and am leaning towards it for my first round (I do liquid for R1-2). I've never used it but hear it is also yellow. Can anybody tell me how badly it stains? Thanks for any input.