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Not the Amazon/eBay LED lights. LED might be a good choice for you. But, I would swing by the "indoor->LED" forum to get some basic overview of what you should be considering.

Be careful with inexpensive LEDs found on Amazon, eBay, (Mars Hydro, et. al.). They aren't good investments. They usually run as hot/inefficient as CFL or HID. If efficiency isn't important, then they aren't a lot of money to lose. But, T5HO and CMH will produce more useable light for less watts...

You don't need a lot of bulbs in that space. With the LED lightbulbs, about 20-25 watts per sq ft. That's 80-100 watts total. Say 8 - 10w bulbs (80w total two in each corner). Or, 4 of those and 4 Cree 18w PAR38 floods in the top corners as top light. That would be 112w total (28w/sq ft, which...

Mars Hydro growers tend to think in terms of "adding another light." When you see 90w/sq ft grows (on an autoflower, no less!) and referred to as "results, not rhetoric" it makes me want to define terms. :)

You may need to put it on a dimmer (first find out if it will operate on a dimmer). Then add some sidelighting to make up for it (the link in my prior post). That might be your only choice if you're not comfortable with LST'ing the plant, or get get enough distance between the light and the...

Good info! I just looked at the first two products I saw on the FF site and saw things like guano, worm poo, kelp. I didn't realize they have more hydro-friendly products. I make that distinction in the future.

There is a spreadsheet which will let you see the NPK ratio of mixing two (or more) bottles. The nice thing about being aware of your NPK ratio is that it helps you "read your plant" instead of a "schedule." You can remove yourself from boutique "lineups," getting any NPK ratio you want from any...

I'm the same way. I don't like adding salts that aren't needed. It's kind of confusing that the OP's using a nutrient "lineup" created for soil in a soilless (typically considered hydro) environment. I would have used General Hydro's product. I.e., I thought GH created the GO product line for...

That's probably the difference in our terminology. I'm saying if it's not somethign you'd use in hydro, I wouldn't use it in soilless (because it has organic sources of nutrients). It sounds like you're saying it's not perfectly organic (the OMRI stamp, etc.). That's more than the point I was...

You're creating NPK ratio 1-1.9-1.7. That's pretty high in PK. (In soil, I end at 1-2-1.7.). If you've been doing that for awhile, it could explain why the plant's looking rough right now. Maybe someone who uses the so-called Lucas Formula could indicate whether that's how it's supposed to...

What are you feeding? Are you doing too much "bloom" schedule (too high PK?).

Someone mentioned pH. Obviously you're not a new grower on a budget (your growing big). I suggest buying a Control Wizard Accurate 8 soil probe. Costs about $70 on Amazon. It's fairly accurate for a soil probe. You have to follow a procedure to use it (scour the probe surface before using. Leave...

They look overfed to me. Photos in natural light will help you get better responses!

That's pretty warm. And, radiant heat at the leaves could increase that at the leaves. Maybe rotate that strain to a different location, see if the fan affects another strain similarly. And, raise the light at the other location (for half of them) and see if they improve? You could cover a few...

How tall is your cabinet? You may have bought the wrong kind of light for your space. If it's just 4' tall, you'd do better with 3w LEDs mounted on a white backboard. When LEDs are in reflectors and/or secondary lenses, and/or 5w diodes instead of 3w -- any of these factors make them too intense...

Maybe the radiant heat from the lights is too much for this strain?

Would you even use General Organics in a hydro grow? Wouldn't General Hydroponics be a better choice for that?

It would be nice if there was a definitive guide to "how to use Fox Farms for Cannabis." Just from seeing new growers using it, it seems confusing for the reasons already mentioned. Something people could just follow without what seems like guesswork about burning seedlings with Ocean Forest...

You've made this point a couple times. What is your definition of organic? Would you use it in hydro? (I see stuff like worm castings and bat guano on the label and that says for "biologically active" medium to me.).

This appears to be the same problem the OP posted about in the "problems" forum. I don't understand how it could be overfeeding when he's using soilless. Pro-Mix HP has enough nutrient content for about 1 week. He's been in it for 4 weeks? Seems odd that 1/2 tsp would cause burnt tips(?). I...