well its not been working for me as you can see. im going to start using calmag. what B-1 formula should i get??? i re read your ppm chart and have decided to reduce my reciculating from 1400ppm to 1000ppm where you recomend/ the blue widow looked like the NEW leaves have some tip burn(thanx for the info on yellowing leaves) so i gave it a flush and will continue with your ppm chart. one question....how come drain to waste has such lower ppm strength compared to recirculating and should i follow their ppm recom,( 850-900 max)or go by your chart at this week 4 1000ppm. i read you were in soil. does ppm your chart apply to hydro as well?? thnx again. my next grow i will definately use your ppm chart and not hit them with 800 right away, i do believe your info is helping tremendously