How much Cal-mag do you add to supplement your hydro grow?
Bottle says 5-10 ml. per gallon of reservoir. I've been adding a bit less than that in fear of over-nute. I have a few older leaves on only two plants that are a bit yellowing but with some necrotic spots and patches. It looks kinda like the pic and description of Mg deficiency or Potassium deficiency. PLants are only at three weeks veg so I don't want to overload them.

WOuld Silica Blast (Potassium Silicate) help if it was an actual Potassium def.?
I already use SilicaBlast but less than what the bottle recomends.

Not sure WHAT it is. Don't think it's over-fert. No leaf tip burn anywhere, new growth is fast and strong.I would send a pic but lights are off right now. I use RO water, Floranova series, Diamond nectar, Floraliscous PLus & Hygrozyme. I use the recomended amounts in their phase feeding chart, but I use a 4 gallon nute mix, for a 5 gallon reservoir to keep TDS not too high. TDS is around 1650 after addition of everything including Cal-mag, and Silica Blast.

It's not a big deal, I don't think it can harm them as long as it doesn't spread. It could be the genetics too, female and feminized seeds can get funky I've heard. What do you think?
Stormcooker Reviewed by Stormcooker on . Hey Zandor........ How much Cal-mag do you add to supplement your hydro grow? Bottle says 5-10 ml. per gallon of reservoir. I've been adding a bit less than that in fear of over-nute. I have a few older leaves on only two plants that are a bit yellowing but with some necrotic spots and patches. It looks kinda like the pic and description of Mg deficiency or Potassium deficiency. PLants are only at three weeks veg so I don't want to overload them. WOuld Silica Blast (Potassium Silicate) help if it was an Rating: 5