what you think- curled-under leaves

[dire1234]

ok i am not using a co2 boost it is because my heater for the house is on. but i am bring fresh air from out side too, also i am using tap water, yes there is a lot of different nuts, i know i need to tone it down but i do not know what is the best out there to use. i get a new pic up tonight i try pulling a leaf and i post it

[Weedhound]

I thought to really be effective C02 levels should be around 1500.

[dire1234]

here the pic of the browning

[stinkyattic]

Oh! No CO2 at all, you REALLY need to fix your ventilation problem.
You never answered the question about where you get your water, and if you are running a calcium supplement.

[dire1234]

ok let me say this i am venting air from out side so i am bring fresh air in to the room. and water is tap water

[enquadrider16]

ok now im no expert on growing, but i've grown before and i have become obsessed with growing. but why are u using so many god damn nutrients? to me it looks like nutrient burn.
you said you bring air in from outside so thats good, stop using co2 (if you are) fresh air from outside has plenty of co2 for your plants. other than that the only thing i can really tell you is keep the temperature down. good luck man.