The GH powdered Pro nutes are excellent, they made their own Jack's style line but then decided to market it to commercial growers because they don't want to eat into their more profitable liquid and 1 part nutrients for home growers. You can definitely run them similar to jacks, just have to experiment a little. Sometimes you can get the bags on clearance even at online hydro shops, just have to keep an eye out. This line is very clean as far as heavy metals, like other GH nutes.