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Great! Thanks. I just figured that with the exhaust fan off for periods of time, the air would lose CO2. My tent isn't "sealed" but it is a tent. I have active air in though, not passive, but I guess I could just open some of the vents. Appreciate the insight. I'll just have to give it a try.

Yes, a controller like this is what I'm talking about. If my exhaust fans are off, however, where are the plants getting fresh air from?

Yeah, that's why I couldn't do it before as I was doing perpetual harvest. I don't think I'll do perpetual again. It spreads out the labor of harvest and trimming, but it's a constant pain.

Sulfur as a cleaning measure or if it comes up again?

I've got a 5x10 tent in the basement. With Summer approaching, this may not be an issue anymore, but I want to get set up for next winter. The humidity was way too low. I don't understand the best way to set up my grow tent. The plants need air flow, so my exhaust fan is running all the time...

I'm not sure I understand. Do you mean from a space perspective? You will need a dark place to hang dry. I ran into a similar problem with this last grow and ended up buying a small grow tent just to dry in. You could also but one of those portable fabric/plastic closets from Walmart or...

Some people water 3-4x per day with Coco but it's typically smaller pots, smaller amounts, and during flowering. You're using fabric pots so it is even more difficult to over-water, but not impossible. You could always pull the root ball out and have a look. Are the roots white and sweet...

Mmm... Did you use seeds or clones? Seed can have a lot of variance. I just trimmed some plants and one plant had 60 grams, the other had 90! Trimming and training all yield differences as well. For me, it's a math equation. How many hours per week are you spending tending to plants? Look at...

Yeah, I thought that at first too which is why I was so annoyed. I flushed with straight water a couple days ago and nothing has gotten worse. I'll water heavily again tomorrow with a light compost tea to re inoculate and flush some of my built up salts, but hopefully that's it. Here a photo of...

Thanks for the help. It's very much appreciated.

Isn't that you guys?

Yeah, it does. I've been using good ol promix but wanted to try and get away from feeling like a chemist with all the bottles. I was hoping I could just supplement with nutes, but it looks like old habits and nute schedules got the best of me... FoxFarms isn't a "water only" soil, but after...

Ok, so. I just ran some pH 6.5 water through the soil. The runoff pH was 6.4. however, the ppm going in was under 120, coming out was 1700+! Yikes

Dude! I don't know why I wasn't thinking nutrients... I think that since there was no yellowing and I've used these nutes with such great results before that I wasnt even going in that direction, but looking up both P and K issues, it is definitely somewhere in that realm. Well, that's good. At...

Thanks for the input! Yes, Fox Farms can run hot. The soil is the same soil and pot I had used from the last week of veg (last time I up-potted to the final 5 gal container). I did have some mild nute burn early in flower so I tuned bottled nutet back and didn't have burn after that. I've never...

Yeah, I thought it was the fan, but all plants have been affected and the problem seems to be moving up the plant. I found one of my buds with dry crispy leaves yesterday too and dry buds so I cut that off to be safe. I really don't know.

Ok. So, at first I thought I was having a nutrient issue coupled with fans being to high or something, but everything else seems fine. Here's my grow: Indoor grow tent, active interesting with intake filter Temp: 68-79 Humidity: 25-35% (yes, super low, can't get it any higher here in the...