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You could be a little less abrassive in your response to someome who's just tying to help you out while having very little infomation to go on. You didn't mention anything about not giving fert in 3 weeks, so I looked at the picture you had posted. Dark green leaves and curled tips usually...

You probably burned the hell out of the root system. What people don't seem to realize, is that while H2O2 can be beneficial in SMALL amounts, it can be quite harmfull in larger doses. H2O2 reacts with and oxidizes organic matter, including the roots themselves, therefore, large amounts of H2O2...

They're "ram-horning". Too much fert. Back off on the nutes.

When you cut them down and trim them, etc. they will stink the worst, since you're agitating the plant. However, once they are hung up to dry, they will become less odorous by the day, as they dry out.

I would recommend that you get a centrifugal inline fan, like a Vortex or something similar. A 4" will do for a small space like that. The inline fans that you can find at wally world, etc. aren't designed for long duct runs, ie. they have very little static pressure. It'll cost you more, but...

No, just reduce the PPMs a good bit. If you go with straight water, you're likely to do even more damage to the root system from osmotic shock.

With the clawing, and dark green leaves, it looks like too much fert. Try backing the PPMs down to 1200 and see what happens.

Without seeing pictures, it seems like they may be suffering from root shock. Give them a couple of days to recover, and go easy on the nutes until they do.

Man, the best thing you can do for those seedlings now is, wait for it.... absolutely nothing. Let them be, let them grow. There's nothing wrong with them other than being a little on the soggy side. Do yourself a favor and don't touch or look at them for about 3 days. In about a week, when you...

Overwatered. If you're in soil, don't water for another few days or until the pot gets very light, if you're in hydroton, don't water for at least another 24 hours. If the leaves perk up after letting things go dry, you'll know that it was overwatering. Roots need water and AIR, if it lacks...

If the bubbles are directly under the probes, than it most certainly will mess up the reading. I have a Ph and TDS pen, and if I move them over the bubble column, it throws my readings off (especially TDS). However, as long as the probe is not directly over the air bubbles, then it won't make a...

Well, being that you're using hydroton, which doesn't hold much water, you can go ahead and flood 3 times a day. Just make sure the rockwool starter cubes don't get wet, flood to a point just below the cubes, and only flood as long as it takes to reach that level. Don't flood when the lights are...

How much nutrients were added? What was your TDS at the time? What is your highest res temperature? Roots should stay nice and white (maybe a little discolored from nutrient but otherwise white) Does your PH go up everyday? You mean, you have no nutrients added to your water? You should at...

Depends on your substrate and growth phase. What are you using for a medium, and how far along are the plants?

General Hydroponics 3-part Flora series (Micro/Grow/Bloom). They're reasonably priced and they're renowned.

Well, Calcium hydroxide is considered a strong base, so it seems like it would probably be a decent choice for PH up. Go easy on it, a little goes a long way with this stuff. As a bonus it also provides a good bit of soluble calcium. Citric acid, being a weak organic acid, is probaly not the...

You could always go with the, tried and true, Lucas formula. You just use Micro and Bloom without the Grow. Under fluorescent lights, use 5ml/gal of Micro and 10ml/gal of Bloom. Under HIDs, use 8ml/gal of Micro and 16ml/gal of Bloom. That's it.

Definitely a smart idea, especially in small space like that. For the cost of a mover you could get yourself a full light kit (Ballast, bulb and air cooled reflector). Doesn't make much sense to me. I'd sooner go with two 400's any day of the week. You'll get more wattage with two 400's and...

I wouldn't follow this advice. 24hrs. of darkness isn't going to speed up the transition from Veg to flowering, and probably won't reduce the stretch (I'm inclined to think it would actually do the opposite). Just switch to 12/12 as per normal and be sure to go easy on nitrogen (too much N will...

No, you're right, 4 600's would be way overkill for that kind of space, not only that, but keeping temps down to 75F or even 80F would be almost impossible. I've got 2 air cooled 600's for my 3' x 8' system and that's plenty of light, I can assure you. It works out to 50w per sq.ft. which is...