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If it's causing bad air flow, do it to prevent rot and PM.

You might be over/under watering. I like to water every 1-2 days in soil. I feel like after 2 days of sitting wet, the water has no more oxygen and the roots sufficate.

I doubt it's the defol.. if anythig they could be worse if you didn't. looks like transpiration issue. More leaves means more transpiration. Whats ur medium and water schedual.

I find this to be true in my experience. I use lime and instead of a pH meter, slight Iron chlorosis is my main indicator. If It starts to go away, I know the pH is falling or I'm feeding a bit heavy/buildups are occuring. A runoff ppm/pH test veryfies this and I top dress with some lime. I...

Look hungry to me.. Your flowering nutes have no N? Whats the silica for?

You should be good, start bending her over (Low Stress Training). Keep the light 2~4 inches from the top(s). find a small oscilating fan to keep the light cooler and fresh air for the plant.

That'll get you started for sure. 75 actual watts right? Not equivelent? How bigs the plant? CFLs will do about a square foot of plant each. look into topping, LST to utilize this area.

I've only used soil pH readings to verify what I already suspect, very low pH. I've never felt the need for any more accuracy. You can't accurately adjust soil pH like you can hydro, so what's the point? "too high" or "too low" is good enough for soil.

Inaccurate, yes. Ignored? No. IMO If you are trying to fix a .1 deviation in pH with a super accurate reading, you are just weird. I don't believe soil itself is consistent enough for accuracy.

use both as exhaust, passive intake. You don't need negative pressure, but it's more efficient to pull air vs pushing

Pistols turn brown/red from a bunch of reasons, like heat, wind, ect. Look up the strain you are growing if it's not bag seed. If it is, look indica/sativa comparisons of Leaf wideness to get a rough estimate if youa re in the 9-10week zone or 11-14week zone. Use loop or handheld 50-100x...

I've had one plugged in the same circuit as my cable signal amplifier thingy for a couple days now. I'll update if anything.. Coiling excess cables was mentioned in another thread I think. Can anyone confirm if that's safe or true?

I've notice some digital electronics if you point an IR gun at them they will either show crazy high temps, or "error". This could be another way to check for leak. Had a cheapo that showed error anywhere pointed including the bulb. Lasted a day before dying. the replacement of the same...

Looks like dead plant skin. Sometimes older stalks shed strips or damage from removing a leaf that pull more skin off

Whats your light/fans distance

I'm betting a little longer. The growth is still symmetrical, opposite phyllotaxy.

Could be a tiny bit of transpiration stress from heat/light/RH and-or fans What kind of lights, how close? Also I believe coco has to be pre-charged with calmag. if the distorting leaves begin on new growth, make sure it's not a calcium lockout. Like CannaCountry said, give them time to work...

I think you might have to reduce the veg time bit if you are going for sog in 1 gal, 8w eeks sounds like a bit

So I've had this laying around for awhile, not sure why I havnn't done it yet.. I had plans to turn this fridge into a super-micro grow also but never got around to it. It consists of a fan, and some kind of powred heatsink that makes the aluminum block (detatchable) get pretty cold fast...

lets see a pic of the plants, if you aren't getting alots of iron chlorosis it's not an issue/ prob isn't as high ph as you think.