Fungus or Nute Def??? Please need HELP!!!

I currently have 3 clones vegging under T5s and CFLs. 2 are white rhino and the other is AK-48. Recently, I've been noticing that there are copper spots and others that look like fungus on the lower leaves of the larger white rhino clone. Botrytis killed my last two clones. So I'm worried I have the same problems but I have way more air circulation on this batch than the previous one. Temps stay around 75F and humidity 43%. I have one oscillating fan blowing directly on the plants and another fan blowing from underneath the plants. I have lights n fans on 24/7 for the past 3 1/2 weeks since I got them.

Medium is 60% Coco soil and 40% perlite with 1 in. of hydroton on the bottom of the pot for better drainage.

Monday I fed the larger white rhino 200ppms of Magi-Cal,460ppms of Grow Big in 1 gal of RO water. Run-off was 680ppms and the PH was 6.1

Thurs I fed the larger white rhino 200ppms of Magi-Cal and 7.5mls of Hygrozyme in 1 gal of RO water. Run-off was 470ppm and PH was 6.24. Havent watered since but soil is getting dry again. Not sure whether its a nute def or fungus. Any help is greatly appreciated!




Same spots are showing slightly on the lower leaves of my other white rhino clone

Anyone have any idea what it could be?

Got some better pics of the affected areas. Its slowly spreading to the upper leaves. I really would like to know what this is so I know how to treat it. The soil is pretty dry but I will wait another day to water.

Whats up G37Kush, It looks like it could be a Magnesium deficiency.

I read that you could add 1 tablespoon on Epsom salt per gallon of water. Until you can correct nutrient lockout, try foliar feeding. That way the plants get all the nitrogen and Mg they need. The plants can be foliar feed at ½ teaspoon/quart of Epsom salts (first powdered and dissolved in some hot water). When mixing up soil, use 2 teaspoon dolomite lime per gallon of soil.

I've not tried this myself, but Hopefully this helps!

Wassup mr. Senator. Thanx for the reply.Ya I was thinking a Magnesium deficiency also. But I also read about Calcium deficiency.
CALCIUM (Ca) Lack of calcium in the soil results in the soil becoming too acid. This leads to Mg or Fe deficiency or very slow stunted growth. Treat by foliar feeding with one teaspoon of dolomatic lime per quart of water until condition improves.Could it also be this? And I don't see why Im having either of these deficiencies when I put 200ppms of Magi-Cal in my water everytime. Should I just increase the dose of Magi-Cal or should I try a foliar spray of dolomatic lime?

If you already have the Dolomatic Lime, give it a shot and see if it makes a difference. Maybe try it on one clone and add more Magi-Cal for the other, see what works best between the two. I usually foliar right when the lights come on. Does anyone else have any feedback or ideas?

I dont have any dolomatic lime. But still contemplating on whether I should just try watering with more Magi-Cal right now and see what happens in a couple days. Or should I try watering with a 1/4 gal of RO water to get a PH reading before I add anymore Magi-Cal to make sure it isnt a PH problem?

Made a decision. I watered with 255ppm of Magi-Cal and then bumped it up to 740ppm with Grow Big. PH of water w/ nutes was 5.9. After watering, PH of run-off was 6.1. Hopefully this fixes my deficiency in the next couple days.