Hi guys,

I need some more Lowryder help. Posted a topic a while ago about yellowing tips and figured out that it was probably due to low temps/overwatering. I have totally curbed my watering and have managed to keep temps at a pretty constant 25c. Problem is that a couple of them are still showing yellowing. They are all the same age, 4 weeks today but 2 of the taller ones are still yellowing. Will have to do pics over a couple of posts: Heres a general pic of one of the affected plants.

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Overall the 2 that are of the same pheno (taller/less bushy) are doing well, still growing and budding up nicely for 4 weeks despite the yellowing.

affected leaves:

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Top shot of problem:

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The problem is only happening on new growth. If you look at one of the leaves a couple of nodes down (on the left) it looks bad but that was due to me accidentally snapping the stem when i dropped it. The yellowing problem was present before this and is appearing on one other plant.

Heres one of my other lowryder 2's from the same batch of seeds. Same lights, temp, humidity, soil etc but no yellowing. but also a different pheno:

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As the ones that are not affected are a lot smaller and bushier the only other conclusion that i can come to is light bleaching. I have a 600w HPS with cooltube, which is about 10 inches away from the top of the tallest one. Theres also a 250w CFL thrown in there for the younger auto ak's but I dont see how that could be a problem. Anybody have any suggestions?
Any more info needed just ask,

Cheers Guys

Your lamp is too close causing light stress and bleaching the leaves.
Back the lamp off 3 or 4 inches.

Thats what i figured, just wasnt sure as the problem seems to be worse on the smaller of the the plants that are bad. Plants are outside just now to give them a rest from the harsh light.
Thanks for the help chrisesq, its much appreciated