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that looks like one "300" watt light (really 170 ish?) and four "60" watt lights (maybe 9-13 watts each). just saying that doesn't look like 1400 watts of light

that's some pretty good advice there

using anywhere between 4.5-6g a gallon MC + 1-1.5g epsom salts per gallon, depends on if i see a mag def forming. comes out to where i need little, if any, adjusters to hit my ph range with my tap water. usually 5g MC + 1g epsom. give or take.. edit: running a few different strains with the...

why not use a black 5-gallon bucket with a black lid, and use something to stir it with? black will block the light out, and there are way too many 5-gallon DWC grows on this site alone for them to have a big enough effect on the nutes for it to matter. i personally use a 2 foot section of black...

is it a deficiency, or too much nutes causing an imbalance that mimics what a deficiency? if they transpire faster or slower than they should, it will effect how much EC the plant needs to look deficiency free. i linked a video where he specifically talks about having to reduce ppm's by 25% to...

i thought heath robinson did some grows with a bunch of small hps lights kinda like a super slow blink. maybe 12 of them, but ony 3 or 4 were on at one time. iirc he killed it.

it's amazing what a different point of view can do for you. i've gained the most knowledge from comments that seemed to be outta left field, but in actuality was the missing link to finding my problems. i tend to read horticulture articles, written by greenhouse workers. here's a great sire for...

i really think that "VPD too high" video is an eye opener. @ 3:23 seconds in is some crazy solid info.

another thing i haven't seen mentioned too many times here, and i think it's a carry-over from growing with hid's... under led's, you probably shouldn't blast them with a fan directly like you would in a hid tent, it causes the leaf surface temp to get too low, and the leaves to transpire too...

i don't think that chart takes into account leaf surface temperature. try this one instead. http://opennlabs.com/vpd/VPD_calculator.php check this video out: low temps + high humidity is not the same as high temp+ high humidity, the former is more likely to grow molds/fungus etc.., the latter...

hello ribrian, cool to see someone from the smallest state in the country lol. i wish you all the luck in the world man!

720 watts for a 4x4? overkill in my opinion. hopefully you can dimm them and have some way to supplement co2 for that much light.you might be able to use 200 watts or so less.

gman.... wouldn't be gamy by chance?? if you don't understand, then don't worry.

hell yeah, need a bud-um-bing long and thin may be in, but short and fat is where it's at! :wink:

i had the exact same problem, dimming solved it. you could be at the upper limit of ppfd and the plant can't metabolize fast enough. the closer to the light the plant gets, the higher the par #'s are, and obviously the ppfd. maybe co2 would help, but raising the light and/or dimming would help...

i hear that a lot, but it still can happen, especially if the plant doesn't have the root mass to support the light intensity edit: it's amazing what an inch can make when it comes to intensity.

how close is the light? maybe it's too close. weird problems with too much intensity with led's vs hid's due to the lack of infrared and uv. try raising the lights up. too much ppfd and they will start looking like they have a mag def, i'm likely wrong, but at least think about light distance as...

http://www.greenerhydroponics.com/The-Equalizer-Hot-Spot-Diffuser-HPS-1000_p_79089.html?_vsrefdom=adwords&gclid=Cj0KCQjw5-TXBRCHARIsANLixNyqdC9lvzTDPv26lLLsKmbO6J1IPiK20ES9WVnjcvhsBjfkvDxoRhQaAuMHEALw_wcB these would correct your problem if the problem plant is directly under the center of the...

why not use both? led + hps combined would be better than either alone. grab a led that's high in blue, if using cobs go 4000k or maybe even 5000k. they make great veg lights, but the combined spectrum would be more than the sum of it's parts. whatever is best for you. good luck!

that's a sexy girl there.