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Looking good. Give them a day or two to recover and then take off about 5-10 big fan leaves that are blocking lower bud sites per day until they're all gone. It'll grow back more leaves over the next week or so and you won't even notice you did it. The leaves look fairly flat which is good. If...

Keep the controller and rig up some kind of little arduino thing with a little high voltage sparker to light the alcohol and a servo motor to bring a candle-snuffer down on the flame when the power from the controller cuts off. If they're bringing in $430 for a minigen, I bet you could sell a...

I thought about using a flameless oxidation reaction of methyl hydrate with a palladium catalyst, but then I remembered how cheap it is to get propane delivered to my door. Minimum price per pound of carbon was my goal, and it turned out to be propane. You definitely have a way lower up front...

I could calculate the difference for leaf temp but my hygrometers aren't calibrated well enough to be within 5% humidity anyway. It The bearings were completely gone. The blades and the motor axle and windings fell out of the front of the fan. Even if we had fans with ceramic bearings, the...

It's all the same principle. An AC is probably more efficient since refrigerant can probably carry more heat than water can. I used a calculator to figure out how many BTU my setup should be putting out, and assuming this thing doesn't run very often it doesn't seem like it'll be a problem. I...

Leave it to the national institute on drug abuse to not give us a handy chart to grow our schedule 1 narcotics with.

They do. It's at the end of the abstract: "The study reveals that this species can be efficiently cultivated in the range of 25 to 30 oC and ~1500 μmol m-2s-1 PPFD. Furthermore, higher PN, WUE and nearly constant Ci/Ca ratio under elevated CO2 concentrations in C. sativa, reflects its potential...

If you notice on the chart I posted they have all the values over 70%RH greyed out. Even though it is the optimal VPD and I've tried it and it works, it wreaks havoc on your equipment. I had a clip fan violently rip itself off the tent pole when the bearings rusted out and it started vibrating...

I was with you on the higher humidity train, but then I tried to find the study you just asked for and it turns out that they found drier is better. At least that's what it says in the abstract. https://sci-hub.tw/10.1007/s12298-008-0027-x

Have you run it without water cooling? That's what I plan to do as I'm currently running an induction bulb on an inkbird controller as a heater because the LEDs don't produce enough heat. I don't see the point of a chiller other than moving the heat to another room. My central AC is ultimately...

Did I mention I also have been soaking it in horticultural oil for 3 years?

You shouldn't aim for runoff every time you water after that first soaking. Just make sure it doesn't dry out completely and then only water as much as is needed so the pot is light by the end of the day. If it's still heavy water less next time. Plants can handle the salt stress of no runoff...

Compaction happens to all soil, and it's just a byproduct of watering. The more you water, the more it happens. The best solution is to put stuff in there that can't compress, like a shitload of perlite. I put 50% perlite in my mothers, since they have to live in the same tiny pot for months on...

Arduinos have shitty power regulators because they're built into the microcontroller so any decent amount of current draw will max them out. Use an external power supply, like this...

I use a damp rag, or if I'm feeling adventurous, some rubbing alcohol. They don't really get that dirty though. I have a QB304 that has been running for 3 years and I've never cleaned it. I just blow the dust off the heatsink.

I run all my outdoor DWC buckets with hydroguard in 105F heat in the summer and I don't have any problems. I even got lazy and didn't use it for one year and only one of the 6 buckets got sick. The bacteria just persisted in all the other ones. I'm about to harvest like 25 mandarin oranges...

Is Photo+ appropriate for hydroponics?

Growing liquid cultures is not that simple. You would have to maintain the same sugar content without introducing any other contaminants. You would also need a liquid culture jar with a syringe filter in the lid to keep out contaminants but exchange gasses and a magnetic stirrer to provide...

Just noticed some new stuff from HLG: https://horticulturelightinggroup.com/collections/all/products/hlg-550-v2-eco https://horticulturelightinggroup.com/collections/all/products/hlg-225 Keep up the good work HLG!

This stuff is more geared towards soil than hydrogaurd, and it's cheaper: https://www.amazon.com/gp/product/B00VXQG23O/