Help needed 400w dwc Leaves curling up

Hey everyone. I have looked through other threads and i cant find anything exactly matching my situation. Flushed 2 days ago and I'm running a weaker than suggested mix of nutes hoping to counteract the curling and darkening. Initially it was the first two leaves that started to darken and curl now it seems to be happening to the rest with stiffer edges and slight curling. I have moved the light up to give it some space. i know Im forgetting some detail that would be helpful. Strain is White Rhino. Thanks again everyone.

Edit- water temp is 68

do you have a PH Pen? if you ph is to high that can cause a whole bunch of problems. and most ppl say that you should give them like 1/4 of the nutes or less when theyre that little.

ph is good nutes say i should be at 600ppm im at 300.

remember nutes are going at full strength. if at full strength nutes the ppm is supposed to be 600 the multiply by the amount your using. 600ppm x 1/4 nutes = 150ppm more or less depending on what you water ppm is. I just figured that out myself, i was wonder why my ppm was always half of what the chart says then i remember im only using half strength nutes.

If you overdosed her with N, the damage is done. If they are burnt- even a little,THOSE leaves will never recover. From the looks of the size of your seedling and depending on what nutes you're using, I would say anything over 150ppm could be too much. Are you roots showing well?
I keep my starting ppm's very low, to avoid burn. A little burn 4 wks in likely won't hurt you too bad, but on that youngster, It's a lot.
I keep it low until my roots reach the water. NOW- I start w/ 2gals. of water in my 5 gal bucket, keeping it ph'd, once a day, I dip and pour a glassful over the plant. Once the roots have made it INTO the water, I start turning up the heat about 50 ppm every other day. I add my nutes and make any changes that need made, and by bedtime, I can usually tell if she's accepting it or not. Slightes begin of leaf curl- STOP, adjust your water by reducing 100 ppm. If I was at 450ppm, bumped it 500 and noticed it curling me a little, back off the nutes and let it catch up.
Always better to be too low, than too high.
And, too, stressing one early on def increases the likelyhood of hermies!

Are u using metal halide for veg, or hps? Either way, at this stage in growth, they don't need an intense light. They'll actually start out quicker if you keep it up at least 24", until it takes off, then gradually increase intensity.
I REALLY want to grow some of that, please let me know how she smokes!

Hey! I'm in Texas, too!

I flushed her last night brought it to about 115ppm and backed off the light.yeah the first two leaves look like they were too far gone but the others look ok. yeah im using a 400w mh now and have a hps for flower

should i cut off those 2 doomed leaves

I don't like to cut off any of the fan leaves until they're 40-50% dead. I believe as long as there's some healthy surface on the leaf it will help, particularly at this stage, they need all the green surface area they can get. As the leaf begins to die off, usually beginning at the tips, I'll use my little scissors and trim it back to the green.
Watch your injured leaves though, that's a weak spot where bugs like to start first. (And when they get a little bigger, I will trim back or cut off any leaves that are touching my bucket/rim- bugs will use these points to get on your plant) Bugs are an almost unavoidable evil, but anything you can do to keep them from getting in and taking hold will help you , I can't stress that enough!
I use a 10x loupe to look at the teeny emerging shoots for burn on the tips. They're pretty cheap on ebay. I like the 420Scope, it's worth the money, and you'll need a good magnifier to watch for bugs and check your ripeness at harvest time, if you don't already have one of course.
Thumbs up on the MH light for veg and HPS for flower! Once I figured out that in the early part of the year, the sun's path of travel is still in the south, thus away and less intense. As days get longer the light intensifies as the suns path of travel moves north (NE), and the sun is directly above and intense as it's going to get.
So now, I just apply that to my growing cycle, and adjust my light source accordingly. Piece o' cake.
A little 40 or 60 watt cfl's all I use on my clones until they start showing some new green, then when I put them under my MH, I start out about 3' or so away. I let her catch up and get her feet under her and get a little root action goin', and we're off to the race!

First root is in the water I can see more coming out of the sides. The leaves look pretty toast so ill trim them back and never do that again. Thank you so much for the help dude how can i give you some rep

Right on! Roots showing is a good thing. It will focus most of energy growing a root network over the next few days to a week, it'll happen surprisingly quickly. Then you'll notice the plant beginning to grow, and then you can begin adding a little bit more juice. I found a "generalized" nute chart here on RIU, I'll pass it along. It's pretty close, enough that I've had little problem while using it. I do believe the higher end of the bloom nutes to be too high, though it may be based on a full grown plant that vegged for many weeks instead of just three or four. I dunno
View attachment 2495284 Your ppm's will likely fluctuate from time to time, Really helps to keep daily notes, so you can compare readings daily. When she takes off veggin', she'll start taking more solution- up to 1/2 gal or more a day! And these 3 things will occur-
(1) You've set the ppm (we'll say @ 500) and ph'd to 5.8-5.9- (sweet spot). You check the next morning (I do all mine in the morning) and the ppm's have climbed to 540, and ph drops to 5.6. That only means she drank some without taking in many/any nutes. Add only ph'd water to bring your ppm back down to around 500 again.
(2) You check the next morning and ppm's are 475 and ph has gone up to 6.0. She sucked up more nutes than water, so mix your solution to 500, adj. the ph, add to your rez. Then ph check and adjust rez. If it does this for two or more days in a row, I might bump up 50 ppm.
(3) It sucks up water like no tomorrow, and nutrient and ph readings remain the same- that's your sweet spot! Mix your solution at the same levels top it off
It's all good, man. If it weren't for a lot of help from the folks on here, I'd have been in way over my head from the beginning.
A lot of guys on here can be real dickheads! Several of the very good growers here are a little blunt and arrogant, but most all of the good ones will give you solid advice

Thank for this spliffer!