Great results from this. Easy used. PBT can leave a brown residue everywhere but...Everything is bigger this grow with generally same conditions as last grow (3/4 of the plants had a relatively hard start this grow so started at a disadvantage to the last one that was faultless at the start). Worked from a feed chart I built before even buying the stuff!!! Wouldn't not go anywhere near Botanicare's strengths (EC2.8 in flower...mental!!!) Run more like 60% of what they recommend and adjust if deficient (which nothing was this grow).