I gave Humboldt Nutrients' Oneness a shot since I was looking for a one part formula for veg with a higher phosphorous content, but ended up very disappointed. The one part formula is VERY unstable, extremely acidic, and forms a nasty film in the rez even when using airstones. Had to add a ton of pH up just to get it in the right zone, and a day later, had jumped up a full point again. I have almost an entire gallon of this stuff still, and wish I could just get rid of it. Two thumbs way down.