Girl Scout Cookies Extreme DWC LED

Day 25: All looking good so far, plants looking healthy. Day 28: Starting to get the overly green leaves as I did in my last grow with the Dos Si Dos. Starting to think it is due to the amount of nitrate based pH - I am using. Just ordered a RO filter. Day 31: Had been starving the plants with 1EC as my tap is 0.6EC so I was only feeing them 0.4 EC so I have upped my EC to 1.3. This is probably what caused my deficiencies and a slight N overdose in my other grow. I have ordered an RO filter to remove the tap water from the equation. I have topped the plants to the first or second node and have started training to build manifold. Also took cuttings from the topped plants and inserted them into rockwool cubes that are partly submerged in plain tap water. No clonex or any nutes in the water, the last batch I did like this all worked except one and that was due to keeping it in the tent out of the light and with no airflow which caused rotting. Now the days are longer they are sitting on my window sill.