Supernatural Superboost is designed to be used in all growing mediums up to two weeks at a time. It contains the high phosphorus levels that young plants and ripening plants require. Superboost is also designed so that when mixed into solution, it automatically mixes to the correct pH. This is a big advantage to the grower to help reduce the possibility of stress and shock from pH fluctuation due to faulty test equipment or inaccurate reading during the most critical stages of plant growth. Our pH Smart? technology makes conditioning rockwool a snap.