I have done searches for just about everything I can think of related to hydromulching and hydroseeding. I have found alot of useful information, and I thank all of you for taking the time to post it. I have a Turbo Turf jet agitated 500 gallon machine with a 13hp honda engine and 3x3 pump. I am just learning the business and have done about 4 acres so far. So here is my question or problem. I can't seem to keep my hydromulch from washing out. I am using Jetspray 80/20 pellatized mulch with the poly fibers. Turbo Turf recommends 120 lbs in a 500 gallon tank. I am using 160 lbs, using 4 lbs of tackifier. I did 10,000 sq feet yesterday in 2 loads on about a 5 to 1 slope. We got about .75" of rain in several hours. Never a downpour, and alot of my work washed away. What am I doing wrong?? I feel like I don't have a product that I can guarantee to a client. Any suggestions? Should I try more mulch? Will my machine handle it? Is it typical that rain will wash it away?? Would maybe bales of paper mulch be better? I really appreciate any help anyone can give. I am really hoping Muddstopper pitches in on this one.