Mr. Dominick, in your video on cleaning moss and algae of the roof you demonstrated applying the cleaning solution with some sort of spray applicator (not the $10 pump sprayer).  What is the sprayer that you used to cover large areas.  I have a very large roof and I would like to acquire the applicator you demonstrated while making “how to  remove moss from your roof”.  Hope to get a reply from you which would be absolutely fantastic.  Thanks!