Strange symptoms

[Cyklon]

Just saw some strange symptoms on my loved ones.

The first thing I noticed was leaf curling upwards, but without any necrosis or chlorosis on the curled leaves. Instead I saw brown spots on some leaves, mostly older leaves. The older leaves are also very slightly deformed. Could it be a heat-problem? I have a proper fan and I don't burn my hand when touching the canopy. Lamps are 20-30 cm from the tops and I am also using light-spreaders to mininmize heatspots.

I took some pictures for easier diagnosis.

I transplanted plants from ~0,5 liter pots to 10 liter pots. I used high-quality planting soil (mineral fertilized) and added a bit perlite. I switched from 200W MH to 2 x 400 HPS. 5 Plants under each 400 W. They look quite healthy, but these symptoms are worrying me a bit.

I transplanted them about a week ago and have given them nothing but tap-water so far. The pots are quite big and the soil is rich in nutrients so I decided to wait a bit before giving some fertilizer.

My tap-water is around pH 7 and the soil is buffered with lime. What do you think has happened here? Too much heat or something else? Will test run-off water later today when its time for watering.

The only thing I can think of is that I watered first with tapwater that had been sitting in a clean container for a day or two, and since it wasn't enough I then took fresh water from the tap and also used that. Could that have any serious effects? I kind of doubt it.

What do you guys say?
Peace

Sorry about the shitty quality, I have a shitty camera.

http://img178.imageshack.us/img178/1596/foto00532.jpg

http://img12.imageshack.us/img12/2645/foto00542.jpg

http://img35.imageshack.us/img35/8831/foto00552.jpg

http://img114.imageshack.us/img114/4426/foto00572.jpg

http://img239.imageshack.us/img239/7990/foto00592.jpg

http://img505.imageshack.us/img505/7678/foto00602.jpg

 

[Mr.Hades]

You definately have some heat stress and nute burn.... Lower room temps to around 72-80 degrees, make sure the lamps arent too close and decrease feeding. As you can tell the lower foilage isnt effected while the top is curling upwards. Also make sure you have good ventilation, good airflow throught the room.

 

[BurmeseDragon]

^^^I agree and that white spot looks like something spilled and then burned.

 

[Cyklon]

Lamps raised, one more fan in work and a light flushing with pure tap-water.

PPM was a bit too high which I find a bit strange sice I added no extra nutrients except for the small pots which were given light feedings only twice. Well well, hope it goes well.

Thanks for the informative answers. All the best to you guys.
Peace

 

[bitpoop21]

did you use bleach to clean? it looks like bleach burn or heat.
flush the shit out of them.

 

[Cyklon]

Lamps are almost a meter above the canopy now, and the temperature in the canopy is around 26,5 Celsius.

Leaves are still curing upwards and it doesn't feel too hot in the room either. 2 proper fans are circulating the air in the room, and the room is also open. I flushed them a little yesterday, I think I might have to flush the shit out of them tomorrow.

Can nuteburn cause leaf curling like that, can it be something else than heat?

Peace

 

[Cyklon]

did you use bleach to clean? it looks like bleach burn or heat.

The pots were not entierly clean and didn't smell of any bleach. Don't think its bleach. Thanks though.

 

[HeadyPete]

You need to adjust your water to 6.3, especially because of the lime in your soil. Your soil should be 6.3ish. 7 is too high.