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https://www.icmag.com/ic/showthread.php?t=147954 Is this where you were reading?

My 2 cents worth. I use: 1ml/gallon of Rapid Start 6ml/gallon of Clear Rez each week Aquarium heater built to keep water at 78F With Clear Rez you really can use water that warm and the metabolism of the clones really takes off. The pic is of 16 day old cuttings. And, have patience, it seems it...

Here's what I do with the bulk rockwool. I tear it into pieces and mix it with coarse perlite. It works great, and can not be over-watered. I've tried. It holds a lot of water and a lot of air...about 50/50...like the small RW cubes, but a lot cheaper.

Great video. Thanks for sharing. I have only used bolts and rivets...'till NOW! Inquiring minds would like to see some of your frames.

https://www.rollitup.org/t/par-multiplier-thread.928907/ Here is a great thread on using a multiplier and a lux reading. So for most "warm" cobs/strips take LUX reading in thousands TIMES 15. That will get you in the ballpark. So it won't give you the exact number of photons, but it will help...

I have used GH Armor Si and DynaGro Pro-Tekt both at 2ml/gallon. I use it the whole run. It does raise the PH some. You're already growing some killer buds, so it will be interesting to see how your foliar feeding works!

Why yes I did! The girls got some big buds! It's the way the roots grow out into that mat (with no media) that really floats my boat. I will try that one day. So have you tried the batting as a mat?

Looks like your garden helper did a good job while you were away. On the skinny branches with GS, have you tried any silicon supplements? I don't know the percentage gain, but the branches and main stem are visibly bigger when I use silicon. I've done some late-in-the-run supercropping and...

https://www.rollitup.org/t/keeping-a-sterile-res-in-dwc-shock-chlorine-advice.948306/page-3 Check out post #43 Turns out the chlorine combines with nitrogen (fairly popular in nutes). I have seen this for myself testing with pool or hottub strips. I have a good 4-5ppm chlorine, then I add...

https://www.rollitup.org/t/greenleaf-nutrients-and-mega-crop-happy-to-be-on-riu.946071/ A lot of good info in this thread.

"1 to 5 ppm of free chlorine is safe for humans and cannabis. 1ppm for HTH pool shock is 0.10 grams per 10 gal. " from post #2

Good on ya for your first run and diving right in. I grew a lot of tomatoes in DWC and F&D so I could learn and wouldn't stress when I'd toast 'em or kill 'em! I can't get 50% either, just 29% H2O2 here. So I double KLX's dose and just dump it right in the bubbling res. I've also tried 6%...

"2x4 F&D tray with 100L res flooded every couple of hours with Canna Vega A&B, dosed with ~20ml 50% H2O2 every 3 days. Current keeper mums are a Dinafem OG Kush and Samsara seeds Sweet Black Angel (Black Domina x Super Silver Haze). Both loved by my circle." So I'm taking from this: He's using...

Check out post #1

I'll bite...what are PGR's?

Does the second picture say 4000K?

Use any bennies in the res? My plants are light eaters with DWC. Nothing over EC 1.2

Some growers use quilt batting on the bottom of their flood/drain tray to retain moisture between floods and something for the roots to hold onto.

Many safety issues? Sounds like only one. And they admit it...and they will send you the fix. Relax Grasshopper. It's all good.:mrgreen:

The lm/watt doesn't tell the whole story as so much of the energy is out of the lumen curve. The 2.74 umols/joule is where they really shine (no pun intended).