Hi r3m1 i try to lower it as much as I can now I'm getting 60 and at the highest 75 ,sometimes it's lower depending on the weather outside, I try my best on a budget. I feed every 2 or 3 days , the roots come out of the bottom of the drain holes and they look healthy as. When I follow the label I run into problems that's why I started with 1ml and worked my way up to but still run into problems , I am using 2ml of A & B bloom & and cal mag extra