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PH fluctuations causing lockout? pic number 3 looks like nitrogen deficiency

The importance of weekly flushing to prevent nutrient lockout....learned that one the hard way

you mean the two fans are pushing air through the same duct? this wont increase air flow, it will only go as fast as the fastest fan. correct me if i'm wrong anybody? but, if it works why not right?

yes that does mean PH balanced and yes it is ok to use the PH up and down during flushing

you mean transplanting to larger pots?

also, don't apartment buildings have spot checks for grow ops???

depends on how many plants you want to grow. if you want to harvest every couple of months you have got a little work ahead of you....you'll need to setup a vegging room (or closet) (your vegging plants cannot be in the same room as your flowering plants) the amount and size of lights will...

trust me, it's worth upgrading!!! they look sad

First off, not laughing. Everybody's gotta start somewhere! Those babies need more light. The left one looks thin and stretched and is going to have some trouble supporting buds. Definately get a ballast and hood for your 250W HPS get some light into those babies. what kind of bulb is that you...

yep, looks like nutrient lockout causing nitrogen deficiency....

test the ph of your water before adding it, then test the ph of your soil afterwards to ensure its right. If your soil is WAY out you may need to flush 3-4 weeks vegging is optimal but you can flower at any time if I'm not mistaken

with that size room a 4 inch inline exhaust fan with a passive intake will be enough to exchange the air

you just want an oscillating fan blowing on the plants, if you have a fan constantly blowing on the plants they will waste energy building stronger stems than you want. one oscillating fan blowing on the plants and a single exhaust fan (with a carbon filter if you don't want smell) will do just...

right away! although plants smell considerably more during flowering

just try feeding more frequently, but remember to flush to prevent nutrient lockout again, this is just my opinion, the more you can get the better! I had plants that were the same color as yours and it turned out to be a nitrogen deficiency so thats why I think this

unfortunately over-watering and under-watering can produce the same symptoms lol. Try using your hygrometer probe thingie, you can test the soil a little deeper with that. if it says DRY water. I would try feeding the plants a little more frequently. The plants look like they are all a...

3-4 days between waterings? could also be letting them get a little dry, under a 600W HPS (HPS definately tend to get warm which will dry them out faster) Do you have a hygrometer for your soil? You want the soil to dry out but not TOO dry (if the soil is seperating from the edges of the pots...

I would use HPS for flowering. They look like they are starving for light to me. keep the light you have as close to the plants as possible without burning the leaves. (hold your hand under the light, if its too hot for your hand its probably too hot for the plants). Top the tall one if you...

Lol thanks guys!

Sorry just re-read your post, a couple every day does sound like nitrogen deficiency