It isn't calcium that is added, but beneficial bacteria (lactobacillus acidophilis, bifidobacteria, lactobacillus paracasei (as was mentioned in the OP)) that feed the soil microbes.
Used at such a dilution that smell isn't an issue. Anything that introduces the bacteria would work, but...
Vincent Gallo said Green Poison was pure evil. I'm real curious to hear what you think, once you get around to smoking it.
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Bummer cheezey, maybe your WD will come back. Live and learn, I reckon.
Those guys just build the lamp, the LEDs appear to be Chinese made 1w x 112. I think you would've been much better off with Cree LEDs. Hope it works for you, but I have my doubts.
That's why you should stop watering several days in advance. If it gets too cool, it might be a problem, but room temp should be safe if the soil is dry.
Plus, absolute darkness isn't required, so you can check the buds in low, indirect light.
The info I posted regarding 72 hrs of darkness increasing THC by 30% wasn't a matter of opinion or rationalization. It was done under laboratory testing protocols to determine maximize potency for pharmaceutical mj. It is a matter of record and can be researched for an accurate assessment...
If you aren't using much fertilizer, and it's organic, I wouldn't flush at all. I'd just water with water alone for the last 2 or 3 wks. The last week I'd stop watering 5 days or so before harvest, and turn out the lights 72hrs before chop. This way you minimize chances of bud mold and max...