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In my hydroponic lettuce I spray each week to prevent tip burn. It’s absorbed thru the leaves. We do use calcium nitrate in our recipe mix. In our spray We use on-guard calcium 1-0-0 at 5% The calcium is derived from Calcium chloride.

So if I did the 850-1000w per 5x5 I would need 16 lights? Ouchies. lol I got the AC covered. Used to be a bulb cellar si it’s a big refridge. I would just need decent humidifiers and a heater. It’s has 8” of foam on all walls and ceiling. So I’m gonna add reflective Mylar to all 5 walls.

background. I help run our family business. We run a greenhouse. 13 houses currently. 4 of them we converted into growing hydroponic lettuce. We grow 4 kinds mover the past 8 years. Before that we did seasonal items such as Xmas pointsettias, Easter Lillies and tulips. And we still do spring...