Atami Rootbastic Atami Rootbastic is a super concentrated root stimulator that promotes increased root growth through Bio Stimulants and Bio minerals. Rootbastic will not only increase root mass but will also help newly formed roots fight against root disease and guard against grow room stresses, keeping plants in top condition. When preparing your nutrient solution to be careful not mix them together in their concentrated form. Add each part of your nutrient schedule to your tank separately, mixing thoroughly before adding the next component to the mix. Atami Rootbastic Feed rate – 0.1 – 0.3ml /Litre throughout the growth cycle.