Still trying out my new Mytee In-Line sprayer. Still seems to be using more product than I thought it would. Today I used it in a home with about 2,000 sq feet of carpet. I used about 4 qts of pre-spray. I am using 400 psi, and certainly not soaking the carpet. Also today I used Grand Slam, which says to mix 48oz to 5 qts of water. Normally that would give me 12 gals in a pump sprayer. On Saturday I used Powerburst which is mixed 6 scoops to 5 qts of water, that would normally give me 3 gals in a pump sprayer. Why the big difference between powder and liquid?.