PJ Diaz
Well-Known Member
The OP is growing in coco, aka hydro. That's what this thread is about, try to pay attention. Most hydro growers start with 0 EC water (or close to it using RO filters), so they aren't gonna have any chloride in there.There is more to life than hydro. It's not all about you.
This is what FloraFlex says about Cl
Chlorine (CI) is required in very small quantities and there is usually enough in the water supply. Chloride toxicity is a more common problem and this is the reason chloride is usually not included in most feed programs including ours.
I've already said that gypsum could be useful in soil, but that isn't what this thread is about. It's about a coco grow. You are a "PeatPhreak", so not sure why you are even here giving advice to a coco grower.
This started because you suggested a DIY "Cal/Mag" made of gypsum and epsom salts. Honestly "Cal/Mag" is the dumbest shit. There is no such thing as a Cal/Mag deficiency. Calcium and Magnesium are antagonists to each other. The only reason that Cal/Mag is sold is because excess of one can cause a deficiency of the other. Forget the CalMag, and just give your plants a proper balanced feed and you'll be fine.