I have an ebb and flow system and was sold a three part Advanced, Grow, Micro and Bloom from my local shop. I have some newbie questions. I got a hold of Advanced today and was told the PPM recs on the back were for soil and a once per week feeding followed by 6 days of water. He gave me a custom PPM schedule and told me to run at one fifth of those values for ebb and flow. The first week of VEG at 300PPM divided by 5= 60 PPM. My tap water is 150PPM. Do I add or subtract this number? I dont see a way to get to 60ppm and it all sounds a little off any recs?
thx
thx