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This post was originally about VPD. 83/55 according to the VPD chart I have is way into the stress zone.

Some negative pressure is desirable.

@guitarguy10 Thanks for all the info! I think your thoughts about ducting the exhaust outside are good! I'm going to try it. I have the infinity 6 in my shopping cart. With controller of course. My light is a Spider Farmer SF4000 LED. I've been experimenting with manually adjusting the fan speed...

I came up with the same conclusion, and I'm going with 6. The calculators for CFM don't lie. I think one thing I'm apparently doing wrong is I have my air filter and fan outside the tent with a duct running in. Looks like everybody else mounts filter and fan inside the tent. I had an intake fan...

I'll be following your advice. I also have a 6" intake which is probably too big too. Again, I live in the SE US, and the humidity and temp vary wildly during this time of year. Keeping the temp/hum at a proper level is driving me nuts. What I'm doing now can't possibly be right. I have my 6"...

Looking at an Infinity Cloudline 8" with the controller.

So, I'm growing in a 5x5 tent, organic soil. SF 4000 lights. I live in the southeast US, hot and humid. I have a small A/C in my tent. My intake fan is sucking in humidified air from a humidifer/the room. So one place I read that 70-85 F. and 40-70% humidity is where you want to be. Great. Then...

I posted a revised recipe below. I can't have chickens my dogs would kill them for sport.

I just posted my revised recipe below.

I have filled the holes the dogs dug with the soil I made :) You made me nervous. I cobbled together this recipe and plan from yours and what I had on hand/what I could get quickly, since I have two seedlings in Rockwool that are almost ready. My recipe and plan: Base mix: 5 gal BioBiz light...

I've learned the hard way to take all advice with a grain of salt, and find agreement elsewhere before I try it. And the youtube videos I watch are from experienced growers and scientists. I trust them. Do you mean chicken pellets like they feed chickens?

I found your recipe, and will adapt. Thanks so much.

No, TWO 5 gallon, total 10 gals. And these are autos. Photoperiod is my next challenge. Does that change your comment, or do I need more cal and mag?

The teas I'm making with 1 cup of whatever nute I'm feeding in 5 gal ph'd water, bubbled overnight with an aquarium bubbler.

It was all guessing. I couldn't find a definitive recipe I liked. This is based on watching a buttload of YouTube videos. for the 2 5 gal pots I'm using: 1/3 each Mushroom/Humus compost, Biobizz Perlite around 2-3 cups each Neem Cake, Blood Meal, Fish Bone Meal, Kelp Powder Mycorrhizal...

I forgot to include the worm castings and Perlite, they are in there ! I've overwatered to death, so I'm generous with Perlite. Azomite and ecothrive, I'm checking that out. Thanks man.

I'm taking a shot at living soil, and feeding with organic teas. I've mixed Seabird Guano, Neem Cake, Blood Meal, Fish Bone Meal, Kelp Powder Mycorrhizal Inoculant, Mushroom Compost, Humus compost, Earthworm Castings, Perlite of course, Epsom Salts BioBizz for a base. My first shot at...

I'm growing White Widow Autos. Five. 3GAL containers in 3/4 BioBizz lightmix 1/4 perlite. 2 1500 W LED 1 150 HPS 5x5 tent. humidity 45-50% temp +- 76 We are in mid bloom. I switched to Maxibloom powder as an experiment I used 1 tsp/Gal as directed. I failed to mix the powder well enough and...

I use distilled water, 82 cents a gallon at walmart. Perfect pH.

sorry, BioBiz light mix with 1/4 perlite. Those are the numbers for the runoff when I nuted today.