ttystikk
Well-Known Member
1350ppm@EC x 500= 2.7 EC, I run up to 2.0 under my CDM lamps and would not try more than 1.7 EC under HPS. I'm in RDWC.They recommend 10 oz of special blend, 4 oz calcium nitrate, 2 oz of magnesium sulphate per 100 gallons of water.
Should be around 1350 ppm
Also, the girls are going to run out of nitrogen and calcium in a hurry at that ratio, no bueno. When I'm running things right, the calcium nitrate is the largest single constituent of the mix, or at least tied with the hydroponic mix. That's what it takes to keep them green!