TW Trouble

[upperhydro]

On my 3rd crop of TW (from Clones) and now I have major 'leaf curl' and some leaves turning yellow. Other strains on the same rez. are growing GREAT but the TW started showing curl as soon as it went to 12/12. Any ideas? I should have my camera back in a few days. I loaned it to a friend who was having clone trouble.
Thanks,
upperhydro

[FUNK4:20]

as soon as flower?--Maybe alittle low on P nutrient and some mag.?

[NightShade]

3rd Crop, it's probably not your fert schedule.

How often to you change your res, do you scrub it? If you haven't in 3 crops, perhaps you need to.
- If this is the case, I would rinse & scrub the Res well, restart from where you left off.

Q's
What is the PPM & pH of your fertilized water, and what is your schedule?
when was the last time you calibrated your device?
Does your friend have the same clones, Is he having similar problems?

[NFT4me]

ive found all my plants do better than trainwreck, it always gets more yellow, and doesnt seem to like as much light, while its equal in quality, im down to 950 ppm and the trainwrecks arent nearly as yellow as they have in the past, but im still not gonna grow it any more....unless i get fresh cuts....just a more tempermantal plant.

[upperhydro]

Great Water in the PNW - 40 PPM.
I clean, scrub, and disinfect after EVERY harvest.
pH is 5.5 up to 5.8 (before I adjust).
PBP is running at 1,000 PPM - May go lower on this bucket.
My 'Rez' is only pH adjusted water to 'top off' Buckets
PLENTY of air on the roots.
PLENTY of air in the room (both incoming and outgoing).
400 watt HPS for 4 Buckets
I calabrate my gauges every 2 months, weather They need it or not.
Buddies TW plants show a little curl but not as bad as mine. He's a 'Dirt Farmer' so comparisons are not possible.
'Betsy' is growing GREAT in the same box. Thai is growing GREAT in the same box.
Each 'Bucket' is individually controlled for each strain. 'Betsy' is at 1,400 PPM and the Thai is at 1,300 PPM.
Camera promised on Thursday (we will see)
Thanks,
uh