Brown/tan blotches on leaves

[DOUGAL25]

Also, doesn't your fert have calcium? Read the contents to see what's there. I haven't read the contents of GH in a long time as I don't use it, but I don't remember it having everything, like boron and sulphur and such.

General Hydroponics Flora Nutrient PPM Calculator
I used this to calculate my .5-.5-.5 (4ml-4ml-4ml/gal) of latewood's feeding schedule. Looks like that nute formula contains almost everything except Boron, Cobalt, and w/e Mo is. It gave me a ppm of 53 & 21 for Ca & Mg, respectively.

Usually brown spotting can mean ozone damage or heat damage and since your day temps are 80's I'm wondering if it's related to heat. There's a good chance that it's getting hotter inside a grow space than just 80 degrees.

I have battled heat stress, but now I've been really watching it. I've been leaving the closet door open and letting outdoors air in the room. Unsettling about the ozone though; in a week or two, I was going to move my Ozone-jr. in there....As of now, it hasn't been near the baby

If you've given that much superthrive, I don't think I would give any more unless you change the water. You don't need much of that stuff.

Did seem like more than normal. I used to just use 1 drop/gal in soil. But I guess I put my faith in Latewood's hydro regiment.



In a few days, the nute strength gets bumped up from 1/2 to 3/4... I'm going to watch for any progression. But as of now, I plan on supplementing CaMg via 1 tsp/gal molasses, starting at that nute change. Thanks for the insight so far guys.