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I have a ton of DWC bins going, and all ppm's were going down at a rate of about 10ppm per day or more, so I was going to raise the ppm's in all bins, but now suddenly the ppm's are going UP, even in a lot of bins that hardly have any water uptake at all. How is that even possible?? Now I don't...

I'm growing in DWC, have a bunch of bins going. Some of the bins are way down in their water level, yet some of them after 3 weeks since the last water change the water level hasn't varied at ALL, it's pretty well right where I already filled it to. That said, based on a recent test my EC meter...

So I was reading Cannabis Culture, reading about CGE commercial grow operations, and I'm wondering why commercial growers tend to use soilless mixes rather than hydroponics. From everything I've read, hydroponics is the fastest way to get what you want, and going with any other medium (besides...

Alright, so I vegged the shit out of most of my plants, and yet it is now roughly day 67 and my plants clearly are not yet ready. I was hoping for them to be visually ready, but finally today my 60x loupe came in the mail, and I may be colourblind (that is, I AM colourblind), but these mother...

So I have a number of plants in a room and the majority are getting that "dense" look going on, some of them are so frosty it's ridiculous... But this one plant, probably the biggest plant in the room, refuses to really take on that strong budding look. It has hairs sticking out and that but...

So I screwed up, dehydrated one box of my 4 best plants, and damn near every single one of the fan leaves is limp, hanging dry and dead. The plant was 3 weeks into flowering, and the hairs still look nice, but there's pretty well no leaves to support nug growth. Should I just chop it down and...

So I'm supposed to change the water in my grow boxes every 2 weeks, I get that, but when I replenish the water in the boxes (pretty much every other day), should I be having nutes in the new added water, and if so, at what strength should I add the nutes? Thanks!!

I changed the water in 3 of my boxes, pH checked and everything, and I only upped the nutrients a bit, and the roots were hit hard. Check these pictures out: Two went from 1/4 strength to 1/2 strength, and one went from 1/4 to 3/4. I used about 1/2 distilled water the first time and didn't use...

Would it be possible to, instead of having my cool tube hooked up to an intake from outside, simply hook the exhaust up to my cooltube and let the tube suck air from the rest of the room? I find this really important, because if I can just get a nice 175 CFM fan and hook it up to my 1000W, I...

So I replaced my frozen-over AC with a fan which supposedly works on a thermostat, but the goddamn things is wildly inaccurate, and my room temps vary anywhere from 87 (and even 90 on occasion) to 68 degrees over several hours. The fan pushes in really cold air, which is good, but it doesn't...

I had an emergency temperature situation. I dealt with it, but now my leaves are still cupping with my foliage temp down way past where it should have to be, and I'm worried about losing my whole crop of seedlings. I've only been giving them 1/4 strength fertilizer, which is what I read is...