Help Plz! seedling leaves are drying at the tips and curling

This is my first grow but it has been a long time coming and I've done alot of research. With that said I have come across my first problem.

My seedlings have started to dry out and brown at the very tip of their newer leaves. some of them are also curling a bit at the margins of the leaf. The weird thing is the bottom pair of first true leaves are fine, but all the others arent...

My PH stays between 5.5 and 6.2 while my ppm stays between 250 and 450. On one occasion pH was as low as 5.3 and ppm was as high as 720.

Also until a couple days ago our humidity was staying around 28% during light hrs and 45% at night. Temps have always stayed between 68 and 78.

Any help with this problem would be very much appreciated.. the link below is my other thread that shows pictures of them.








https://www.rollitup.org/indoor-growing/158768-help-1st-indoor-hydro-grow.html#

First of all your plants are looking a little stretched for 1000w.
How far is the light from the plants? You may need to lower it.
They really don't look to bad considering the varying PH and PPM they've been receiving.
A little bit of burning could be from your low PH or the 700 PPM you hit them with.
i think once you get a little more consistent with these things they'll colour up nicely and settle down.
Try and keep the PH more consistent 5.8 - 6.0 and they should be able to handle no more than around 250-300PPM at this age.
What's the PPM of your water before you add nuts?
Those strains you have are excellent so I understand you don't want to mess them up. I don't think you have to much to worry about at the moment. Your just seeing the result of a little over fert' and PH fluctuations.
All strains are slightly different in what they like and you won't know until you've been growing that strain for a little while. Your in the 'finding out' stage so just keep a close eye on what your doing, which you are, and you'll learn what they like and what they don't.
P.S. Looking forward to seeing some Jack Flash, that gear sounds real good.

Man you are right on with that analysis. Yea I have gotten the pH and ppm alot more consistant. The PPm has gone back up to 430
I guess because Im having to readjust the pH every day to keep it between 5.5 and 6 so today I am flushing the whole system with floraclean and I will be refilling it with a solution that just has grandma engy's H-2(humic acid) and a little bit of vitaboost, the ppm will be 30-50. With this solution runing for a week they should recover, the new growth already looks better. 10/10 Jack Flash germinated and 5 have already come out of the rockwool.

Yea the light was to high because I thought maybe the heat/light intensity was maybe the culprit that was drying out their leaves. It is obvious now that it was a mix between leting the nutes go way to high and the very low humidity. We now have a centrifugal fan blowing through the light, but with the light now 2 ft away from the plants the temp will rise to a high of 83 sometimes even with the new fan. we even have a window right next to the closet that is kept open bringing fresh cool air in. We also have an ocilating fan blowing the hot air under the lamp around. Any ideas that would help keep the temp back at 68-78 would be nice.

Oh and thanks alot for the reassurance Mammath...being a hydro noob I do alot of research and come up with pretty good ideas of how i might be doing something wrong but I am never completely confident in my diagnosing...ppl like you are a pretty good remedy for that.

if they are around 4-5 inches tall with 4 nodes including the new growth...how far away from the light should they be(1000w)

Keep an eye on that PPM. Over 400 maybe a little high but see if they can take it. The good thing with hydro is you get to see instant results, good and bad.
Are you recirculating? I've never been a real fan of that type of hydro. It's a lot harder to keep things consistent. I always run my hydro to waste. Then you just have to keep your resi right and check your run off now and again for salts build up.
Having your 1000w 2ft maybe a little close. Do the back of the hand at plant level to feel if it's too hot. I'd say 2 1/2 to 3ft at the moment.
What sort of shade do you have? Can you pull some heat straight off the lamp via an inline fan and some ducting from the shade? 83F isn't too bad but maybe a fresh air duct into the area would help if possible instead of that window.
Keep me posted.

Mammath said:

Keep an eye on that PPM. Over 400 maybe a little high but see if they can take it. The good thing with hydro is you get to see instant results, good and bad.
Are you recirculating? I've never been a real fan of that type of hydro. It's a lot harder to keep things consistent. I always run my hydro to waste. Then you just have to keep your resi right and check your run off now and again for salts build up.
Having your 1000w 2ft maybe a little close. Do the back of the hand at plant level to feel if it's too hot. I'd say 2 1/2 to 3ft at the moment.
What sort of shade do you have? Can you pull some heat straight off the lamp via an inline fan and some ducting from the shade? 83F isn't too bad but maybe a fresh air duct into the area would help if possible instead of that window.
Keep me posted.

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The light is more like 2.5 feet away i measured it today. We flushed the system twice with Ph adjusted water and some Flora Kleen. We are going to drain the remaining Ph water tomorrow and add the normal nutrient solution. We let the adjusted water run and drip most of the day startin out at 5.5 Ph. I was not watching for a few hours and somehow it jumped up to 7 PH so I shut off the system and we will drain it and add the adjusted nutrient solution like i mentioned already. Average temperature is around 79F and RH is around 40-60% average. A freaking dog attacked one plant, do not ask how but it happened. It is recovering well and more pictures will be posted asap. They are looking pretty good.

alright plants new growth is looking good...keeping the ph at 5.5 - 6 right now but me and my roomate are having to change the readjust it twice a day atleast...Im just wondering if this is normal and if the daily fluctuations from 5.5 to 6 are bad?..Ive heard that chasing the ph isnt good. I even drained the system and flush it with a solution that is supposed to clear up the salt build up. Also the Ph seems to go up a point or 2 after every watering...which is 5 times a day for 30 mins. Any ideas on how to stablize this a little bit better? On monday the upgrade kit to make the waterfarm system recirculate is coming in and i know that should help some...

ill be posting picture soon gotta borrow a friends digital

Good to here some aspects of your grow are improving.
Unfortunately I am not a waterfarm savvy user but there are plenty on RIU.
Maybe do a tag search for 'waterfarm' and PM someone who's running one that can help you with why your PH is fluctuating so much. It's sound weird for it to jump so much.
Here's a link to one thread I found. This guy seems to know what he's doing.
https://www.rollitup.org/hydroponics-aeroponics/119479-waterfarm-mods-tips.html
All the best.

Thanks alot...yea i did some reading on Ph and PPM chasing and I read alot of ppl are having trouble with the hydroton clay pellets making the Ph rise consistantly. I think I might try using ph'd tap water instead of distilled water on my next resavoir change. Thanks for the link ill check that out

SciensWiz said:

Thanks alot...yea i did some reading on Ph and PPM chasing and I read alot of ppl are having trouble with the hydroton clay pellets making the Ph rise consistantly. I think I might try using ph'd tap water instead of distilled water on my next resavoir change. Thanks for the link ill check that out

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Hydroton Clay. It's hard finding a nice neutral medium that doesn't leach shit into a system these days isn't it? I'm a coco coir man myself with a totally different set up so what do I really know.

Get access to some rain water if you can. That's the shit I believe. God given.
Try to make your environment as natural as possible, yet extremely counterfeit and better than nature, that's the quest!

The first thing that i do with any of my plants if they are looking realy ill and there in veg clone has many uneffected clones has you can just incase you can never be too careful.

yea that link for the waterfarms is awesome...im gunna be interested to see how augmenting my system will effect how stable my ppm and ph readings are...I know since the water will be circulating with the water thats in the control rez they should atleast rise half as fast as they are now which is better than nothing...next monay im also going to use tap water for the new nutrient solution instead of distilled. Some one on another forum said that hydroton is ionized and is trying to bring the solution that is deionized(the distilled water) up to its ph to ionize it...I am not sure exactly how that works but I will let you guys know...besides the fact that its alot of work to keep everything in check right now the plants are doing ALOT better... Ive been using a foliar spray fom Advanced nutrients called VHO(very high output) that increases plant growth and helps the plant get nitrogen and potassium if there is nut lock up in the roots(which there may be hince the little bit of yellow tint)..it seems to be greening them up a bit...sry no pics up yet...later today I will have some for ya

tyke I didnt quite follow what you were getting at there?

SciensWiz said:

tyke I didnt quite follow what you were getting at there?

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I think tyke was talking about taking clones from an ill plant so you don't lose the strain.

Mammath said:

Hydroton Clay. It's hard finding a nice neutral medium that doesn't leach shit into a system these days isn't it? I'm a coco coir man myself with a totally different set up so what do I really know.

Get access to some rain water if you can. That's the shit I believe. God given.
Try to make your environment as natural as possible, yet extremely counterfeit and better than nature, that's the quest!

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Hydroton clay is ph neutral,it is the only medium i am aware of that you do not have to soak first in ph balanced water before use.That is why i went with it instead of the other mediums.
I had the same trouble with my ph going up to the point i had to adjust it every day.I blame it on the nuts more than anything.I have changed my brand of nutes and now do not have that problem.I now start my ph at 5.2 and it does not rise higher than 6.8 before i change my water every two weeks.My tap water is right at 7.1 or 7.2 and i adjust to 5.2 before topping my tanks off.Rain water will have to be adjusted also,ever heard off acid rain.OPH

tryin to put some pics up...gotta figure it out...had some1 do it for me last time.

a couple more...there are the 5 feminized jack flash that will hopefully grow some of the best shit ever..

hmmm so it might be the nutes? well im for sure not changing nutes...these are supposed to be some of the best nutes out there. Even if it means I have to readjust the pH every day Im stickin with what I got. I just ordered some solution that helps dissolve the nutrients and helps the plant take them.

Oh yea I was looking under the buckets today and the roots are bairly hanging the in the resicoir water out from the top bucket theyre sitting in...this should increase their rate of growth significantly cuzz we have a seperate pump thats blowing through air stones in all of them..this is exciting.

Hey SciensWiz,
Looking at the entire set up pic you need to get all the plants under that hood, and find a 'happy' distance for that 1000w to be from the plants.
I know you've just started correcting things but those little ones are still looking quite stretched and the light looks about 4ft from the plants.
I'ts know it's better to have it slightly to far away than too close when threy're so little but they look like they've been grown under a 25w.
Also the Jack Flash are really stretched so give those little ones more light as well.
I'm going to follow these babies right through cause no one else has grown them here as far as I know and the Jack Flash sounds like 'da shit' from what I've read.
Hope you get your PH sorted. Maybe you can post a separate thread about your PH fluctuations to get some answers?

yea for the first couple weeks we let them go before you said something about it. I guess its the angle of the pic or something because i just measured it and its exactly at 2' 6" from the top of the plants..should i lower it to 2ft?...also yea the jacks were under 2x 75w cfls for a couple days before we brought them into the 1000w room so the bigger ones did stretch a bit the tallest one is about and inch and a half tall...Should I prop the little guys up a bit to get them closer? i dont want to light bleach them or anything. I moved the plants closer to right under the light here are some better pics of the setup..