what kind of powdered cal mag should i use for super soil??

Im in the process of getting everything but i can't figure out which type of powdered cal mag to use. The only stuff i see is for humans but none for plants.

i believe your looking for lime...garden gypsum is also something to look into

actually i am not looking for lime. i am looking for the right type of powdered cal mag for super soil since that is what is reccommended for people who use ro water? any help very appreciated

hello does anybody use powdered cal mag? if so what kind?

Why don't you just use liquid? I use GH Calmag because I use RO water.

because i wanna do this water only method.

I am doing a run with super soil as well. Here's the thing, Lime is made of two things: Calcium and Mag. So I would suggest using 2 cups instead of 1 cup. Subcool says they tried 1, 2, and 3 cups per batch with no difference, so they settled on 1 for the published recipe to the masses. Personally, I am just using a little molasses in the mycorrhizae and bacteria teas I'll be watering with. No nutes, just micro herd feeding and bombardment.

Da Almighty Jew said:

actually i am not looking for lime. i am looking for the right type of powdered cal mag for super soil since that is what is reccommended for people who use ro water? any help very appreciated

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actually, you are looking for dolomitic limestone.

herbderby said:

actually, you are looking for dolomitic limestone.

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actually, im not looking anymore i already made the batch.

I ended up using some pulverized oyster shell. and i plan on using some molasses when i water and maybe an extra tablespoon of epsoms when i switch to 12/12

Deffinitly use something as I tried useing the water from my 5 stage RO unit from my saltwater aquarium days...little brown spots. Cal def within 2 weeks in veg. I switched back to 48 hour tap water and no more issues.

GH

Just don't use RO water. They are horribly wasteful anyway.

Also, yes Dolomite Lime is Cal & Mg