Calcium deficiency with well water?

T

TheCreaMachine239

Well-Known Member
Doing my first DWC grow and I have what I believe is a calcium deficiency. Just looking for some other opinions to verify what I believe I’m seeing. If I remember correctly it started showing up in the early flowing stage and has progressively gotten worse. At first I thought it was rust fungus but I don’t think that’s the issue. I’m using the GH trio formula with well water that comes out at around .1EC so I didn’t think I would need to supplement with any cal/mag.2F6A5175-C406-45D6-8A08-FE4A12DD975B.jpeg
 
iobloop said:
0.1 EC? You need cal mg. But your nutrient feed may be too strong too.
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It definitely has some nute burn. The GH trio recommended schedule is way to strong for this plants stage of growth. I believe the plant is about a week and a half out based on trichomes. Ppm has been rising every day and the PH has been tanking so what I’ve been doing is draining about a half gallon of reservoir water and refilling with plain water until I notice the ppm starting to drop. Yes, my well water is about .1 EC or 40ppm according to my meter.
 
0.1 is very soft water. I don't know exactly how much GH micro contains it, but i think people usually add about 150 to 350 ppm of cal mg.
 
So the spots appear to be mite damage. I will say your leaves are awfully dark green which would suggest an abundance of N, not a deficiency, so don't go adding more N. If anything cut back a little. I will also say, too much N, can lock out Ca, although I don't think Ca is your issue, based on your pics.
 
TheCreaMachine239 said:
It definitely has some nute burn. The GH trio recommended schedule is way to strong for this plants stage of growth. I believe the plant is about a week and a half out based on trichomes. Ppm has been rising every day and the PH has been tanking so what I’ve been doing is draining about a half gallon of reservoir water and refilling with plain water until I notice the ppm starting to drop. Yes, my well water is about .1 EC or 40ppm according to my meter.
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Way more than a week out........these should help.
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1579104779905.jpg
 
Here is another picture. It looks like a bunch of tiny pin dots. Some yellow and some brown and mostly on the leaves closest to the lights. I did not see any bugs under the leaves. It’s getting worse.
 

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.1EC well water? That's lower than most tap water. How is it being treated prior to use?
 
I’ve been doing 1/2 TSP per gallon. Should I step it up to say 1 TSP per gallon? I keep having issues with my Ph crashing . It’ll be fine for a day or two and then randomly drop.
 
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