Ok Quick update the flush stopped the yellowing a bit . I bought canna terra flora , cannazym , rhizotonic and pk 13/14. So i made a mix today for a try .. I followed the reciepe : 20 ml terra vega , 3 ml rhizotonic , 10 ml cannazym and 1/4 tbs of epsom salts! I gave it 1L of the mix we'll see...