I was given free samples of the Elite Garden nutrients line when I went to my local hydro store for gear to start this grow. The mixes of the nutrients did not seem to mess with my water's PPM and PH as much as I had expected. I love that they have an app for my iPhone where it will adjust the weekly feeding chart based on the life cycle and/or reservoir size. It's helpful for when I need to make adjustments on the fly. I feel as if their price point is fair for the quality of their products; seemed competitive with other bottled nutrients at the hydro store.