Homebrewer many thanks again for all the knowledge you have given us! I tried gro dan and had many success, but my concern was if it biodegrades easily? Trying to stay green! Read around that it does not. I have since switched to sunshine #4, but have not been able to get same results as with gro dan. Current setup is ebb and flow, 3gal smart pots, sunshine #4 without vermiculate as it is a recirculating botanicare table, PH 6.4-6.5. I only turn on the resvoir pumps when i start to notice dirt drying out. My feed is protek 2ml/gal, grow 1ml/gal, bloom 2ml/gal. I am tweaking it out still on how to adjust the FFW regimen. Any helpful input would be apprecaited as to what you may think. If memory serves me well you spoke in another topic that one can get away without water week if PPM's are kept at 350 or less? I'm using a .5 blue lab combo meter? Correct me if im wrong. I will post images later of this report on here to see how it turns out.