Hi Ron! Great site!! What's the difference Between
metal halide and Mercury Vapor lighting? would Mercury Vapor work well enough for veg. growth? appreciate any info you can give on this? also, I have Built your 11 plant Garden, and have recently transplanted my first Crop. I notice that the lower leaves are turning yellow. Is this a
nutrient problem? I am using Hydrofarm Bloom/Grow at 1 tsp/Gallon in my 7 gal res. my
pump runs for 15 min. every 2 hours and my
lights are on 18 hours.