Dirtbag
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I've never used Calmag in coco once, always had awesome results. Calcium uptake can be adjusted 6 ways from Sunday without resorting to the old Calmag tonic.Well cuz no one has mentioned the usual. What is your water source? Are you using Cal Mag? Is your coco buffered? First run in coco?
lights are easily solved with a par app downloaded for any smart phone.
have ya read this thread? it should be your bible
HOW TO WATER COCO FOR BEST RESULTS.
Ok writing this cause i see this issue often and rather have a thread to link than explain this each time. This is not my work but a collection of info from many members here and I have put into practice myself. So first off COCO is NOT soil. For best results we want to keep it saturated...www.thcfarmer.com
heres a good thread that you should check as well;
Is this a sign of Ph problems? Or light burn?
I’m also totally against advising anything other than ro myself personally I’ve seen and had too many problems when starting with other water sources.www.thcfarmer.com
and from what i have read right off the bat;
you need imput and out put Ph and PPM to figure out what the Rootzones approx ppm and ph are
you want to water multiple times daily with cal mag in EVERY watering
I agree though that good starting water is very important. Usually either quality purified tap water or that mixed with RO, or lakewater, or rainwater. As long as it has some alkalinity its usually good to go.
If you want to get enough calcium, increase transpiration rates, use a quality fert that has enough calcium in it, and use decent starting water. It's really that simple. I've grown in all kinds of different media and haven't used calmag in over 15 years. If anything I'll use a little calcium silicate or liquid calcium carbonate to bump the starting water. But "calmag" has always struck me as a snake oil cure all.