I recently transplanted my plants into FFOF soil. I was phing my water around 6.5 and getting about the same run off.. That was maybe a week ago.. Now my run off is a bit above 5. So i kicked the water up to about 7. And still am getting around 5 ph run off. I am using no nutes becouse it says on the FFOF bag that there is enough nutes to last up to a month.. What should i do bring the PH up?