Im going to spray my cp's with Ortho Systemic Insect Killer ( i have used it before with no harmful effects) to rid my plants of pests, but now i am questioning the safety. It needs to be hooked up to a hose and sprayed, and of course the water coming out will not be distilled. would this still be alright? Ive done it before, I just dont know about mineral buildup along the road.