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When I was using RO I was a stickler and always calculated out the ppm of all my nutes. Kept cal-mag at about 100-150 ppm usually.. I used those free calcs on the nute websites (GH had the best one). During flower I kept N at 50-85 ppm and P at 140-190 ppm, didn't have any problems, but every...

Ive never used CO2 but from what I remember reading (I think) 1500 PPM is pretty high and with that level temps should be high too, like 85F during light. The combined stress of switching to a higher intensity light and flower prolly has somethin to do with it, but if she perks back up during...

I wasn't sure but it looks like you have a mutated growth on one of your branches, like the plants tryin to grow but cant make tissue. It looks like an even all over leaf edge yellowing with pale green leaves. Im no expert but i think im gonna go with nute lockout of just nutrient deficiency.

Does the humidity get rlly high at night? Since you only found it on one leaf I would just watch the plants closely and keep humidity under 60%. If you can, put em out in the sun for a while it helps dry out mildew and mold I think..

Doesn't look like nute burn, but does look like lockout or a pH imbalance. I'm no expert, but you are checking pH rt? U made it this far so I assume this is ur first prob. I would go with a magnesium deficiency or lockout, since it looks like its starting in the middle of the "veins." When the...

I dont think high temps at night are as much of a problem since the plants arent transpiring much, but I would def. try to keep temps below 85 (unless ur using CO2) at all times. Not an expert by any means, but 103 combined with high humidity in a closed box can cause all kind of problems fast.

Glad to hear you saved her she looks great itd be a shame to see her go.

It only takes a few seconds and a few photons striking a leaf surface to confuse the plants. Just lost a good female to a hermie because of light leaks, and my plants were flowering slow as shit.

Plants do use all wavelengths. They even use...ready... green light! They just don't use it as much as orange, red, or blue. LED manufacturers big claim to fame is that they've picked the wavelengths that plants use most efficiently. But I would like to see an LED with all wavelengths just to...

I agree with this. It looks like its the middle growth and not lower as you would expect during a N def. Most ppl forget about cal-mag and how much these plants actually like.

You can feel the leaves (especially the fan leaves) and detect it about 1 day early. If they feel slightly crispy and crinkly not soft and cool then are most likely suffering from wilt- can't get enough water to leaves. If you know you gave them a high dose and mediums not too moist you can...

Looks nice. Deep purple comin from that light. I love the "alien" look that LEDs give off. Its fuckin crazy that the same lights my alarm clock uses can grow "Decent" bud. I had to buy one to try it out. so far, so good.

Plasma lights are far out IMO. Dialing in the spectrum on those things are a pain in the ass. No doubt the most cost effective way for highest yield per unit of space is a 600 W HPS hands down, but LEDs have made some significant strides. Your plants look sick btw. Noticed some intervienal...

Just "Ease" them in to it. Start with 2 HPS about 24 inches from canopy. Lower it about 3 inches per day until u get to 12 inches above canopy. Make sure u water them more than u normally would and monitor temps closely! dont let it get above 85F for more than 4 hours.

Looks like heat stress/ nute burn. Since its affecting the upper new growth I would go with an immobile element like Calcium. U givin em any Cal-mag or epsom salts? Most companies (I can't understand why) that market fertilizers and soil for weed always seem to lack calcium-magnesium which they...

Damn thats lookin nice man. Nice green leaves and solid white pistils. Keep it up man! My first grow came out like franken-weed, but still was the best smoke I ever tried! Once you finish you'll never buy street weed again.

Yes it normally takes 10-12 days to show sex. Wouldn't be worried. Just make sure you have absolutely NO light leaks. Just lost a female to a light leak (turned into a nasty Herm).

Try an LED! Old hippies will scuff at you but so far they're great for VEG and produce little heat. I would look for a 200 watt panel most focused in blue light, from a reputable company.

Never heard anything about it where I live. Definitely would be something I would look into tho... just run ur day cycles at night.

Ya I agree a 250W would be gr8 for veg but once those bad girls start gettin horny a 400 watt or 600 watt HPS would be best. Keep in mind cooling requirements tho, maybe 2 400 watters would work out better.