I have a questions for you pros. When the need is there, I put down ice melt with a walk behind spreader (driveways). I usually buy the Roadrunner 50# bags at Walmart. My question is I spoke to a person who uses nitrogen fertilizer instead of salt. He said it works just as good as the ice melters and doesn't damage concrete like salt. Also you can buy it in 50# bags or bulk. What do you guys think, fact or fiction? Thanks, Ken.