Yellow, brown spotted dying leaves first grow please help!

Not sure of the exact strain of clones, I know it flowers in 49 days.
Light is 1000 watt mh for veg. On for 18 off 6 2 feet from plant
good vent whole room area in 3 mins on 24/7 and good air movement
Temp during day 83f at night 76f Humidity steady 45%
Growing in FoxFarm Ocean Forest using foxfarm growbig and bigbloom at half strength
Watering with reverse osmosis water ph,ed tp 6.3

Plants are at 6 weeks. I have had this problem for ten days and I need to solve this problem so I can go to flower. I first thought it was ph blocking and tried flushing and not feeding for a bit. I have just started to feed again because they looked hungry. Please any ideas I am posting some pics of leaves and plant. Thank You all.
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Looks like consistent overwatering and possibly time to up their nutes a tad, and/or give 'em a shot of unsulfered molasses at 1 tsp per gallon. Cannabis prefers a wet-dry cycle, so give ample time for drying the rootball a tad after a flush, and don't let the rootball sit in the runoff water. Try and get comfortable with the weight of your pots full, and their weight dry. Helps keep ya from overwatering.

I'm assuming you have the headroom for taller plants, since you're going with the big gun. (1000w) Yours looks like an indica dominate strain though and it's flowering time suggests the same, so it will be likely to have limited stretch.

i will agree with rusty..one thing what i know is that how easy is to overwater your plants/cos it happened with me few times allready and the leaves looked ecsacly the same like your secend pic..small brown dots...

Thank you, I think you are right and things are looking better. I do also think they need a little more N before going into flower, hoping to change the time this weekend. Since I just flushed I hope it would be ok to skip the before flower flush. I have been very light on the Nuts, I will give them one feeding of 1 tsp per gallon of growbig this week along with a little open sesame. Do you think this is good plan.

My room is 7 by 7 and 8 ft tall, but I am aware that I still need to go 12 and 12 soon. Thanks for all the advise.

I give my girls 1 tsp per gallon (half of the recommended dosage) of the Grow Big...but I give that dose twice a week. (Mondays and Thursdays)

I've never needed nor wanted to use the Open Sesame. Nature does this step on her own once you increase the dark period. If you're not careful with the Open Sesame, you will do more harm than good. But since you have the stuff already, sneak-up on a max dosage.
The stuff is strong, so don't over do it...you can kill the ladies if it's overused.
Have you looked at the Fox Farms Weekly Feeding Schedule for soil? Key-in on the use of Grow Big a couple of weeks into flower. Even then, I give 1/2 doses twice a week.

Feeding Schedule:
http://www.foxfarmfertilizer.com/Fox...l-Schedule.pdf

Thanks again Rusty,
Yes, I have that schedule and never use any of their nuts at more than half the strength they call for. I have only given them one dose of Open Sesame and that was 1/2 tsp for 3 gallons.

Did you get all 3 solubles, or is Open Sesame the only one you got?
One of the problems with the solubles in the FF line is that if you use too much, it does damage. Not enough...and it's a diluted waste. Personally, other than the Nutrient Trio I've only used the Cha Ching. (mixed results, but I'm unimpressed)
And regarding the Open Sesame and Sledghammer, cannabis has been flowering without assistance for quite a few eons, so I am unimpressed with the concept of spending money to have the plant do something it's going to do anyway...and you can get a great flush with plain, properly ph'd water. I love my FF nutes, but am baffled by their solubles.

To tell you the truth, I am not happy with FF and I only have grow big, big bloom and open sesame, I don;t even have tiger bloom. I have a friend who has the other 2 solubles and since you use so little he was going to give me some. That is where I got the OS. I am very seriously thinking I will go organic next grow not sure which brand yet but I think there is less chance of problems and I am a person growing my own medicine so quality and taste are everything, I don;t do this for quantity or for anyone else. Can you tell me if there is anything that you found is really beneficial other than proper maintenance. Is bud hardener something you recommend.

Molasses does a great job replacing carbo load products, and I haven't used CalMag Plus since I started using it. It's cheap and available at any grocery store. (Grandma's and Brer Rabbit are common, and made by the same company) I've been using Fox Farms for many years, and see no reason to change something that works fine. But I'm not inclined to purchase something just because it has the word "organic" on the label. A chemical is a chemical no matter who made it. Base nutrients for the plant, and a few extra's for the bacteria that convert micro's into usable nutrients.

A solid potting soil is recommended, too. I'm playing around with Patio Plus right now, and it's doing fine, especially at $5.00 for a 1.5 cu. ft. bag. Kinda similar to Fox Farms Ocean Forest from what I understand. Not organic, but it is natural.

I also use humic acid after my monthly flushes, when I can afford it. Not sure I'll need it in the Patio Plus though. It has some serious ammendments in it already.

You'll have to decide for yourself which are snake oils and which are beneficial products...but keeping it simple is usually best. Some (reputable?) companies offer super-organic formula's that are usually major overkill with a major pricetag, and some additives are nothing more than molasses or synthetic molasses, or "derived" from cane sugar extract or sugar beet extract or similar.
Cannabis grows fine without designer nutrients with bitchen labels, and every possible additive under the sun.

Also, with the Fox Farms line, the Grow Big and the Tiger Bloom have the plant's micro nutrients. The Big Bloom is the catalyst tea made to compliment both. (and it's organic)

Rusty
I will get molasses. As far as application how much and when do you use it.