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No need for links, no one would make a thread about it. That's ridiculous. 12/20 is a great recipe for hermie.

Where's the fan, I don't see a inline fan, Also your bat wing reflector isn't coolable. If you had a cooled hood you'd hook that fan up to it and pull the hot air out. Then your spot would be cooler. Where's the air coming from and what temp is that air. More details please.

Back off nutrients considerably.. IMO. Appears tips are brown, suspecting over fertilization.

Maybe PH swings? Do you check your PH?

Thanks. That's what the intake is for. Where I live I have natural AC outside, beauty of living 10,000ft... :-)

Intake is on a damper. When temp gets to 83 co2 shuts off, intake comes on with fresh cool air, exhaust up high rid the spent co2, temp drops ppm drops pretty much within minute or two esp during winter. CO2 comes back on when the correct temp is desired, both intake and exhaust come off and so...

Vents are 8".. I pull air from outside the house in a window box, and it exists out another window box. I live in the high country, temps are never over 75 outside. I use a 8" Can fan, this fan is only for the lights, its only on when lights are on... I do understand the lights need to be...

Prof, last time my lights were as close as you say they need to be the buds actually looked burnt. Like weird yellowing, leafs got sun burnt too. So now I stick to about 12" away with my xxxl''s without problems, I thought as close as possible because I have no heat due to the awesome 8" xxxl's...

I run several xxxl hoods, did you get the 6" or 8"? Whichever it is get the same size fan to connect to it, pull air from a cool room, and dump it outside your home, or in a attic. I can touch the glass on all my lights with just the fan pulling air through them, and its as cold as the room with...

Strange, what is that medium you're using? I'm a firm believer of superthrive, seems to perk up sickly or stressed plants quicker than without. Looks like you got cooked plant to me, but if the others don't look like that something's wrong with the roots perhaps?

My purple erkle finishes in 40-43 days. I veg for a wopping 7 days.. 4k lights + co2, hydro, SOG. I pull 8-10lbs. You getting 11 lbs off 2k, soil, errr looks like soil. What are you doing different. What strain are you working with? The name of the pic is 60. Wouldn't be day 60 would it?

Two inches away? I'd go more like 12, if that's a T5

Couple things I see right away are the transparent cups, you don't want light getting to the roots, I believe I see roots pic2. Second there's no drain holes. Possibly over watering? You didn't tell us how much your watering, so I couldn't tell you they don't look too droopy, why are the leafs...

Not 100% sure whats going on here but when I had root rot the leafs looked just like that.

Get yourself a decent meter, I'm thinking your soil test kit isn't accurate. If the runoff is truely that low just water with a ph around 7. It'll balance. That is assuming you want your ph about 6.5. The ph doesn't necessarily have anything to do with the yellowing, what medium are you using???

What strength? Looking like you need more bloom in the mix. Also, how are you using that superthrive? Are you using it every watering?

Also bro I'd top and start flowering, that aerogarden's light doesn't go to high... With the stretch you'll be touching the light as it is.

So you suggest instead of using it find a city or different location if your current water out the tap isn't low ph? I'll continue buying 1 gallon ph down for $18, and pinpoint my ph where I want it. Don't you think that'd be a better plan? Or am I misunderstanding you? No disrespect intended.

Wow this thread has been dragged along since 2010. Sirmad, have you ever heard of a product called ph down?!

No not much of a problem, a couple weeks ago you could of went stronger on N, but at this point keep on keeping, by looking at the picture 2 weeks is about right.