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if you send pics of the whole plant and then the affected areas rip'ers can help determine ur problem

humidity is kinda low. 40%-60% are good humidity levels. make sure your ventilating the grow space to bring in fresh co2 or have a co2 generator or homemade co2. water your plants when the top 1" soil is dry. fertilize every other watering with soil.

Is your grow space well ventilated?

I did a reflector light chart on this lumesun reflector. a 1000w bulb fits perfectly in it. and it gives you the most light out of any reflector. the problem is though is that the light spread is uneven, so a light mover is highly recommended.

1000w will get 3 feet of penetration usually depending on the density of the plant. the green portion is still a good amount of light. Really for any 1000w light i would do 12 - 3 ft plants. a 4 x 3. your right about 3 & 4 being much happier. thats why light movers were made so you can move the...

I actually think its a calcium deficiency. calcium deficiencies have deformed new growth. Too much magnesium could cause a calcium def.

can you take a pciture of it. so far I know its a mobile element deficiency.

100% sure its leaf blight, or leaf spot. its a DISEASE. no deficiency.

search leaf spot of leaf blight on google and youll see. ive never had so im not sure the BEST way of getting ridding ofit. i heard unfortunately it hard to cure.

buy a fungicide like serenade and some hygrozyme.

leaf blight i believe. its a disease

how long have you been flowering? its not temp 55 at night is no biggie. if it hit below 50 then i would get worried, but pot is a pretty hardy plant. here a college paper on temp. http://www.cmg.colostate.edu/gardennotes/143.pdf It look like you can bump up your blooming nutes a bit, but if...

inline booster fans are quiet just the way they are shaped, but you can forget using them if you have a carbon filter. they cant handle the pressure. That's why inline centrifugal fans are popular because they are quite powerful and can overcome resistance caused by carbon filters and ducting...

Optimal Distanse highly depend on the wattage, but also highly depend on the reflector. the huge xxxtreme hoods can be placed 6" away for a 1000w while our small refelctor must be placed at least 14" away.

This is also equivalent to Hydrofarms Daystar refelctor more light spread charts are available in my sig.

You reflector looks like CAP's Lumecool Reflector which i made a light spread chart for. Every reflector is a bit different but the general rule is 5' x 5' for a 1000w. I would do 2 600w for a 4 x 8 for sure. It is pretty much and even square. All reflector are.

do you have any cal mag in your nutrients? def overwatering tho. you hsould fertilize every toehr watering and do not wter until the top 1" of soil is dry

Iron Deficiency.

paint the walls flat white. mylars a pain

yeah cheap cfls for seedling will work. as far as carbon filter goes what size is your exhaust cfm and what brand and type of fan is it?