What do you use for CalMag?

rkymtnman said:

i'm on well water and the strain i'm running now is the first Ca deficiency I've ever had since using all well water and Maxibloom. i normally supplement with just Epsom for Mg and Su but this is the first time i've used my cal/mg bottle in a long time.

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I have a strain of UBC Chemo from several years ago that prompted me to have to add in calcium. I pull water from a lake, and no other strain I've ever grown has required it except that one.

spek9 said:

I have a strain of UBC Chemo from several years ago that prompted me to have to add in calcium. I pull water from a lake, and no other strain I've ever grown has required it except that one.

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weird, huh? right after the stretch i saw some rust spots and i was like WTF?, haven't seen those in a long time. lol

Tangerine_ said:

For hydro, I "think" you'd need to nitrates for Cal exchange/availability?

To help neutralize/buffer soil? I don't see why not. Limestone is fairly affordable.

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Would this work in a rezzy? I'm using mostly water soluble nutrients.

Would this also work? Its water soluble

This thread inspired me to feed some calmag.

I never use CalMag. Even in hydro or coco. Tap water and calcium nitrate for the primary nitrogen source provides all that's needed. Calcium nitrate is 13% calcium.

spek9 said:

I have a strain of UBC Chemo from several years ago that prompted me to have to add in calcium. I pull water from a lake, and no other strain I've ever grown has required it except that one.

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I used to run a dredge on rivers and lakes, talk about some primo soil! We would pump the slurry into a geo bag and let it dry out. After about a week of drying, that geo bag had about a dump truck load of black gold.
Once on a job, the bag got pumped a little full, snapped its tie offs, rolled about 100' into a ditch, and exploded like it was filled with dynamite. Covered every inch of the homeowners beautiful green lawn in lake mud. I dont know how many hours I got cussed out, and I wasnt even the one operating the equipment. Homeowner called back a month or two later and apologized, his lawn looked like the 18th green at Pebble Beach.