Whats up with my youngsters , slight yellowing and curling up or twisting

these are only a few weeks old at first i wasnt sure about my ph meter and got some ph buffer and found i was around 1.5 out ! so things seem to have got better plus i only got the big lights on a couple of days ago and they have came on really well

im wondering why some of the leaves are still unhealthy looking tho , i know the bottom ones are bad but i think that was the ph that killed them off , should i pull them off or let them drop off ?

using ionic nutes and have only recently brought them up from .6 to 1.4 which doesnt seem to have changed the leaves

looks like she is being burnt to death,too many nutes.u can pull the bottom leaves off,but u need to flush with water and wait a week or 2 before feeding again.You just gave her a new light she will adjust well as the new lights begin to give her new growth,but she needs a little time to recoop from the ph being so high and time for growing new vegetation.To flush u must give twice the amount of the volume of your container.Say 1 gal container needs a 2 gallon of water flush.Hope this is of help.

They look all out of wack...How often do you check your PH? How fast is it drifting up? Don't make huge changes in your EC like that unless the plant is really starving...you are just compounding the issues by going from PH issues to overfeeding issues...How do your root systems look? Are they a nice bright white or are they a dingy slimey brown? How often do you do complete res changes?

Also don't use imageshak...they suck...use tinypic.com or the image uploader here

...damaged foilage doesn't usually recover....focus on the new growth.

hi , i check the ph everyday but to start of with they didnt look so good hence why i got the ph buffer to check now i check the ph buffer every few days too just to be extra safe

roots look great and it has came on well , for a flush do i just put no nutrients in for a week or so ? or do i just water down ? i fill with ten litres they havent taken on much water before the light change but i think now that will change

havent changed the res's on these yets as they are slightly differnt buckets from my spares so lid wont fit , i like to make a bucket up all ready so i just lift the lid and drop it onto the fresh bucket , im thinking of going for 30 litre buckets these are 15 iirc i have read some people change every week , others rarely change so i was going to do a every 2 week change or should i do it weekly ?

ph doesnt drift too much really between .1 and .3 but rarely.3

ok i will flush out best i can after dinner then and just ph it , an whip of that depressing looking damaged foliage

They look PH shift damaged and very hungry, don't agree they're overferted, they just can feed from the acidic water. Did you buffer the hydroton to 5.5 to start with?

i didnt bother buffering my pebbles as after i washed them for a couple of hours doing lots of rinses and the ph never moved atall in my previous plants and i have heard many others doing the same so just skipped the hassle , could this be a problem ? how do i check the pebbles ph when my water is usually dead on 7 from the tap ? not sure how i would measure it , or do i just soak them overnight in 5.5 water or something ?

now im torn whether to try topping up the feed or flush :/

cluelessuk said:

or do i just soak them overnight in 5.5 water or something ?

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Lol Yes!! XD Sometimes it takes more than a 24 hours of soaking for the water the pebbles are in to stabilize at 5.5. You need to have a bottle of pH down and a meter at hand and check every few hours. That's how you buffer Hydroton so plants don't go throgh what yours are going.

cool and would it be wise for me to change the pebbles now i dont want to handle and stunt/ damage the plants again :/ i could flush 5.5 water over the pebbles a few times ?

cluelessuk said:

i didnt bother buffering my pebbles as after i washed them for a couple of hours doing lots of rinses and the ph never moved atall in my previous plants and i have heard many others doing the same so just skipped the hassle , could this be a problem ? how do i check the pebbles ph when my water is usually dead on 7 from the tap ? not sure how i would measure it , or do i just soak them overnight in 5.5 water or something ?

now im torn whether to try topping up the feed or flush :/

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Sucks doesn't it? You have some people on the side of the fence saying you are burning them...the other saying they are hungry...of course they are hungry...they are lime green FFS...BUT you have burned tips...which appears to be seperate from the lime color which indicates overnuting...and a jump from .6 to 1.4EC on 3 week old plants is petty severe...I haven't done a hydro grow yet(but have researched it alot as I'd like to go that way sometime soon), so I'm either talking out of my ass, or I'm right on the money...the problem is I don't know either, I've just given you what I think it is...if you start a thread in the hydroponics section you might get some better answers from the hydrogods over there

massah said:

Sucks doesn't it? You have some people on the side of the fence saying you are burning them...the other saying they are hungry...of course they are hungry...they are lime green FFS...BUT you have burned tips...which appears to be seperate from the lime color which indicates overnuting...and a jump from .6 to 1.4EC on 3 week old plants is petty severe...I haven't done a hydro grow yet(but have researched it alot as I'd like to go that way sometime soon), so I'm either talking out of my ass, or I'm right on the money...the problem is I don't know either, I've just given you what I think it is...if you start a thread in the hydroponics section you might get some better answers from the hydrogods over there

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You got it right man. No buffering, no rinsing. Of course this will happen.

i thought i wa being gentle bringing the nutes up in 3 stages some people used 1.0 on young plants then raise to the standard 2 for ionic stuff , i started out on .6 raised to 1.4 and then was going to bring it closer to 2

clearly this wasnt gentle enough but now i am still stuck what route to take :/

What are the temps?
looks like bad heat stress.

around 23-24 c

bearing in mind the big lights have only been on for a few days they leaves were a little funny beforehand with the 200w cfl light

What are the water temps?? Is that DWC you have a lot of stuff wrong with your plant. DWC water temps should always be between 63-70 degrees or under 19c. Changing lights wont make the plant yellow there is lock out going on because that plant isnt getting the required nitrogen it needs.

massah said:

Sucks doesn't it? You have some people on the side of the fence saying you are burning them...the other saying they are hungry...of course they are hungry...they are lime green FFS...BUT you have burned tips...which appears to be seperate from the lime color which indicates overnuting...and a jump from .6 to 1.4EC on 3 week old plants is petty severe...I haven't done a hydro grow yet(but have researched it alot as I'd like to go that way sometime soon), so I'm either talking out of my ass, or I'm right on the money...the problem is I don't know either, I've just given you what I think it is...if you start a thread in the hydroponics section you might get some better answers from the hydrogods over there

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Ps : i have grown hydro before

I see no signs of nute burn it is most likely nute lock out due to the ph you have given us. 1.5 you can see from the chart that absolutely no nutrients are available to the plant with an acidic level that high.

Lol buds, sometimes you throw it out of the park! xD

To the OP you can fix this issue. Prepare a new batch of hydroton and rinse it real good get all the powdery orange shit out, then soak the pebbles in 5.5 water like I told you, hope for fluctuations as it's normal then adjust back to 5.5 until it's stable. Have the pots ready to recieve your Ill plants.

You're gonna need a tub to place the pot in and then fill it with water covering all up to the stem. Use the water as lubricant and very easily try to loose the pebbles. Move the pot in angles so they go out of the pot into the tote always grabbing the base of the plant. Put the good hydroton in and viola!

cluelessuk said:

i thought i wa being gentle bringing the nutes up in 3 stages some people used 1.0 on young plants then raise to the standard 2 for ionic stuff , i started out on .6 raised to 1.4 and then was going to bring it closer to 2

clearly this wasnt gentle enough but now i am still stuck what route to take :/

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Once you get your ph back in order the plant will continue to feed so do not over do it at first. I would start @ 0.8 recommended . Only look at the new growth to determine if it needs more nutes

Ok then so the ph was way out and you were under feeding, the affected leaves will not recover, get the ph to 5.8 and a decent feeding schedule and concentrate on new growth, thats if too much damage hasnt already been done.