ok here is is my leaves on the top of one of my plants the leaves are closeing up like a taco is that a ph problem if so how do i fix it my ph is 6.0 i'm useing a hydro drip system plants are in 12/12 for the last 3 days

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can't we all get a bong

I'd hold off on the nutes for a week or two and they should come back to looking nice and pretty. Definitley looks like nutrient burn to me

so i should just use clean water and thats it no nutes

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can't we all get a bong

yeah make sure you ph it and make sure there is no chlorine if you use city water. They'll bounce back fo sho

don't know what the problem is have you got good ventalation the problem is fixable

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"5TON3D AGA1N"
peace

ok well i flashed tank and put in ph water god i hope this works i don't want my babys to die

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can't we all get a bong

Magnesium (Mg)
Magnesium is a component of the chlorophyll molecule and serves as a cofactor in most enzymes.
Magnesium (Mg) deficiency:
Magnesium deficiency will exhibit a yellowing (which may turn brown) and interveinal chlorosis beginning in the older leaves. The older leaves will be the first to develop interveinal chlorosis. Starting at leaf margin or tip and progressing inward between the veins. Notice how the veins remain somewhat green though as can be seen in figure 15.
Notice how in figure 16 and 17 the leaves curl upwards like they're praying? They're praying for Mg! The tips may also twist.
This can be quickly resolved by watering with 1 tablespoon Epsom salts/gallon of water. Until you can correct nutrient lockout, try foliar feeding. That way the plants get all the nitrogen and Mg they need. The plants can be foliar feed at ½ teaspoon/quart of Epsom salts (first powdered and dissolved in some hot water). When mixing up soil, use 2 teaspoon dolomite lime per gallon of soil.
If the starting water is above 200 ppm, that is pretty hard water, that will lock out mg with all of the calcium in the water. Either add a 1/4 teaspoon per gallon of epsom salts or lime (both will effectively reduce the lockout or invest into a reverse osmosis water filter.
Mg can get locked-up by too much Ca, Cl or ammonium nitrogen. Don't overdo Mg or you'll lock up other nutrients.

Got that from the GrowFAQ for plant problems. This may be the cause of your 'praying' leaves. Look there for PICS. the link is stickied under 'General MJ Growing'