Optimum Hydroponix Sonic BoostSONIC BOOST, A POWERFUL FLOWERING STIMULATOR! SONIC BOOST is a water soluble powder that provides plants with very high levels of phosphorus and potassium during flower and fruit development. It also contains magnesium and sulfur. So, everything you need to really promote full flowering. Effectively provides plants with high amounts of potassium and phosphorus, increasing the size and density of fruits and flowers; Dissolves quickly and easily;