Also, I saw on your video of the hydroForce sprayer you poured the prespray in the container. How do you do mix a powdered prespray into the hydroforce? I used a hydroforce several years ago and poured grandslam in it. I have been using a 2.5 gal. pump up for a while and so the mix isn't as concentrated as is the case for a hydroforce. I'm asking because I want to go back to using the hydroforce and i'm about to purchase one. Thanks.