Thanks to all for the comments. Have a question about ph. Have my system up and running. I have eight plants ready, but have not transplanted any into it yet. Figure they will better off where they are till I work some of the bugs out of the new system. I'm using Biotanicare products started with Pure Blend Pro Grow 3-2-4, Cal-Mag 2-0-0, Liquid Karma 0.1-0.1-0.5. I stayed on the low side of recomended dosage, a recomendation I have received from most I have talk to. I do not have a ppm meter yet, but working on it. The ph is running at 7 - 7.1, from what i have read and been told it should be 6 to 6.5. I was wondering if anyone has ever used lemon juice to lower ph? Will it hurt anything? I know there are chemicals to lower ph, but I'm trying to stay as organic as possible. I know Biotanicare prioducts are not completely organic, but alot closer than a lot of the synthetics. Always open to suggestions