stinky please help

[johnny123]

does any one know what this could be? [attachment=o206259]

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[attachment=o206261]

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my problem is this some of my leaves are canoeing and twisting as in pic also the leaf edges (pointy bits) are curling up growth still seems good also will it affect my yield? my set up is as follows...

hydro nft
light 600w hps
ph 5.5-6.0
temps lights on 23c-25c
temps lights off 18c-20c
nutes ionic grow at 1200 tds/ppm
ventilation 2x 5"rvk's extraction and passive inlet
humidity 60%ish
space i am useing is 3ftx5ft of a 3ftx8ft cuboard with 7ft headroom

strain is pure power plant 4 weeks into veg

thanks in advance for any help from anyone

johnny123 Reviewed by johnny123 on 10-26-2008. stinky please help does any one know what this could be? my problem is this some of my leaves are canoeing and twisting as in pic also the leaf edges (pointy bits) are curling up growth still seems good also will it affect my yield? my set up is as follows... Rating: 5

[polishpollack]

25C is pretty warm. maybe that's the problem? 20C would be better.

[Help_Needed]

25C is pretty warm. maybe that's the problem? 20C would be better.

25C (~77F) is perfectly fine. That said, however, I was going to suggest you double check your temps. Make sure you take your reading at the level of the canopy. Because those leaves *do* look like they're showing a touch of heat stress.

How far away is your light?

[Revanche21]

If they are canoeing they might be trying to dissipate water through their leaves

[icbh707]

usally twisting is froma high ph. make sure your tester is calibrated and working right
look here
Revised: The Complete Guide To Sick Plants,pH and Pest Troubles - PlanetGanja.com

[Wobster]

I had the same problem a couple of years back and it was a ph issue. As icbh707 says... re-callibrate your meter and see if the results are the same.

[stinkyattic]

Check your pH on a regular basis, as well as meter calibration, but your plants look healthy. I don't see a problem at all.

[johnny123]

thanks everyone for the quick replies

i check my ph at least once a day with a new meter bought and calibrated last week.raises from 5.5 to 6.1 each day and is corrected back to 5.5
light is about 2ft above plant
i have two thermometers one high up and one at light hight both are reading(+/-1) the same 23-25c
sorry i forgot to mention ther is a 12" desk fan blowing between lamp and plants and with exhaust at top and inlet at bottom air should be well mixed up

one of my plants has now got some speckles on some leaves rusty coloured
somebody told me it was because i am in a hard water area (250ppm)is this poss?

i think i need to take some better pics but my cam IS a bit crap
thanks again and in advance.....

[stinkyattic]

Rusty speckles could be a potassium lockout. Hard water can cause that. There are nutrient solutions that are labelled 'hard water formula' containing slightly lower mineral levels. You may be a candidate for those.

[johnny123]

thanks i will get some hw nutes asap
stinky or anyone do you recomend topping ppp or just leaving i was thinking of topping but i dunno ther already very bushy with plenty of veg time left

thanks again for all input :jointsmile: