Ckbrew
Well-known member
The GH trio micro formula is dark red in color. The Flower and bloom also have a color, but that appears to be something artificial just to please the human eye. Last grow in 5 gallon pots with pro-mix I tried "through flushing" befor the last 2 weeks of flower. Long story it took about 5 gallons to rinse one pot until the runoff came out clear instead of dark red like the micro nutes. I guess I'm wondering if there were really that many nutrients left in the pro-mix, or was it just some kind of artificial dye rinsing out. I was surprised at how much water it took to flush out this color.