Thanks for the info on pre-mixing nutrients! I am using a Cool Sun XL Reflector and a Hortilux Metal Halide Lamp. I have been following the Dutchman's Medical Marijuana YouTube tutorials and reading all I can learn from the Growweedeasy.com information. I adjust the light for 15,000 - 50,000 lux during veg and 45,000 - 70,000 lux during bloom. Will keep 40% to 70% rh for veg, and 40% to 50% in bloom and try for under 25% rh during last couple of weeks of bloom. Will hold temps 65 to 80 F. Lighting is 18/6 during veg (about 6 wks) and 12/12 during bloom (about 6 weeks). Someone told me to use 50% of the nutrient call out to start off and add more if needed. I agree with Carlsoti too; that is also what I heard about RO and why always use Cal-Mag when using RO. Furthermore, they say add Cal-Mag as the first nutrient when mixing as it helps the mixing of the solution (adjust pH after nutrients are added). I also have been using a bait tank aerator to put O2 in the water during the process of filling my RO tank and mixing nutrients.
My light meter says to add a 10% correction factor for Mercury lamps but says nothing about Metal Halide lamps. Would they have the same correction factor? Cant get hold of anybody at the factory.
So, anyway, that is my plan for my first go at growing. Let me know if you have any other advice.
