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This guy is just hoping for free advice and maybe a few impulse box sales. There are already too many companies just like this one, trying to make boxes just barely good enough. They're not gonna put modern, high efficacy COBs inside. Way too expensive.

silent, unlike a Roleadro or Black Dog or other cheap box that guys are gutting out and filling with new parts, the W90 is a solid unit. Unless you have some specific reason (space limitations, etc.) to do surgery on the W90, wouldn't it make more sense to leave it alone and build something new?

You want to grow Sativas in a 3' cube?? It sounds like you're a cautious person who likes to plan things out. Don't throw away all your pre-planning by trying to stuff it all into a tiny box.

They'll notice that something's changed, if that's what you mean. As long as you keep the light schedule where it was, I'd think you'd be fine.

I apologize for the topping comments. Dangit, I hate giving bad advice, especially when its due to my own ignorance. I'm clueless about autos. I bought a small 30 pint GE dehumidifer at Home Depot the other day. These things move a lot of air! If I use it I'll channel the blast of air...

Rooster, I don't mean to offend you. Very often when someone takes a shot at the generic Chinese lights at least one person rises up to defend them. I understand how people who have successfully grown under these lights might feel they have to say something. But when someone is asking for...

Yes, 4 days is way too long. Your little girl looks healthy. 5 gallon bags? I guarantee you she's got roots all the way to the bottom. I like fabric; I think it's good to let the air in, and it's just about impossible to over-water. But the pots' breathability means that more water is...

Weed-noob, if you can order FFOF quickly enuf, go for it. Can you get a small bag of dolomite lime locally? FFOF seems to lose calcium quickly. Add a few handfuls of dolomite, problem solved. I re-use the FFOF. Plenty of threads about ROLS and etc., check into it when you have the time...

All 3 of those lights are blurple. Dead end technology. How many growers have been sucked into the "alternative facts" advertising that always goes hand-in-hand with these blurple lights? Golden Ring 800W - actual consumption 150W. Vipar 600W - actual 276W. Oooh, the Dominator 800, that...

Blurple is a technological dead end. White light COBs are superior. You mention Mediterranean climate. Is that where you are physically? I only ask because I'm under the impression that availability is better in the States than in Europe. Who knows where we'll be with LED tech in a few...

Those COBs, they're causing carnage across America. The tombstones of the COBs, I tell ya, this has to stop and it will stop right now. All those illegal immigrants and their terrorist Islamic marijuana plants with the un-American names like Kush and Alien. With those COBs hanging out there...

The general rule of thumb around this forum is to stay far away from any soil that has timed-release fertilizers in it. Like Schultz Potting Soil Plus. That advice goes double for seedlings! I've had good luck with sterile starting soils for the first week or two, then moving the young plants...

Jeez, frosty buds at ground level...

Check out the pictures for potassium deficiency in this guide https://www.icmag.com/ic/showthread.php?t=231387 That's what it looks like to me. pH is probably the root cause?

Tease

It'd take a little bit of digging, but about two or three years ago Supra was initiating a lot of discussions about heat sinks and what they could handle. Might be worth checking out. tr909, you could boil water with your COBs??

If you're concerned about using some other tech, such as t5's or whatever that might have different "height above canopy" specs, the QB's might alleviate that. Unless I'm mistaken, COB and QB height above canopy seems to be roughly equivalent.

Maybe design this so that you could drop one (or even two) Quantum Boards in the center? I don't own a QB, but the grows that are going on right now sure look promising. If the QB's work as well as we all hope, that would make a kick-ass addition to your project. +1 on going to 1/8"

Have you tried growing without the airstones? Our well water is already 8.2+. On the other hand, I like the idea of keeping everything aerobic. The website also says "don't use anything but our super-duper magic blend in the Hydro-Wick". Any thoughts? OK, now I get it - the 3 gallon vs. 6...

Those Octopots look cool. What size are you using in this grow? I visited their website. They caution that airstones can cause pH spikes. It sure looks like you've worked out the bugs. It would be great to learn some more about these pots and how you use them if you have the time.