Well have done this every way possible and here is the skinny on PPM and nute burn!
In hydro people always say go up to around or at least no more than 1500 ppm. Well if you do that you better be ready for burn!!! Until well and I mean late into flower your PPM should not go above 800, 900 tops. I have seen burn every time in early flower at 1000ppm so if you want a good healty fast growing crop without all the problems top off your rez with only freash water inbetween rez changes and never go about 800 before long into flower meaning when good solid colas are there.... I have done this and I know so take it or don't and then burn away if you don't.....
In hydro people always say go up to around or at least no more than 1500 ppm. Well if you do that you better be ready for burn!!! Until well and I mean late into flower your PPM should not go above 800, 900 tops. I have seen burn every time in early flower at 1000ppm so if you want a good healty fast growing crop without all the problems top off your rez with only freash water inbetween rez changes and never go about 800 before long into flower meaning when good solid colas are there.... I have done this and I know so take it or don't and then burn away if you don't.....