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It will live in 85, some strains might not even feel it, but anything over 80 is considered high and it probably wont grow as fast. Try the swamp cooler too. Just fill a bucket with water, hang some kind of absorbent cloth on the edge (half in, half out), and have a fan blow on the cloth.

I just looked at it. It's very outdated but should still grow 1 plant fairly well. I understand why you went with the 24 cycle now. I would move it to within 12" if it's not too hot and your plant still gets full coverage. You lose a lot of par in those extra couple inches. You're much better...

I'd stay away from hps unless you can deal with the heating problems that come from it. The Mars Hydro TSW 2000 has better par readings than yours I believe, but it's only an extra 30W or so. Probably not worth it for a 10% power bump.

The 24 hour cycle might not be the best idea if your hitting high 80s.

Unfortunate. Add a swamp cooler. Take you 5 minutes to throw one together. If your AC isnt pumping enough cool air, pull out the filter and clean well. They usually slide out so you dont need a screwdriver or anything. You can also make sure the vents on your tent closest to the AC are the only...

I just noticed your temps are a little hot too, get yourself an inline duct fan if you don't already have one.

Could be a fungus. You can mix 1tsp baking soda in a quart of water and spray it down (or buy a fungicide). Also check the underside of leaves for mites. There is a chance it's some kind of toxicity too in which case do a small flush and see if it improves. This could be a lot of things...

I think a nitrogen deficiency is unlikely at this stage. You may cause more damage trying to correct this without more info. Your best bet might be just to keep an eye on it. Simplest thing might be to recalibrate your pH meter and make sure your pH is good. Could be a little too low.

Looks like magnesium deficiency. Yellowing leaves with green veins. I only know from what I've read, I've never had this issue personally. Try adding some CalMag and see where it takes you.

Pretty. I'm growing some GG autos right now. Because they have such a short life, I'm going to ScrOG. I've heard topping stresses them out and slows overall growth. Fine for photo, bad for auto, but it is debated as to what's best. As to your question, I don't see any issue with doing a 19/5...

If you want good lighting that won't break the bank, maybe a Mars Hydro TSW 1000? I have the TSW 2000, but that's probably a little beefy for your grow space, although I'm sure it could work.

Neat, I'd like to see the results of a good FIMming on this girl.

Touché, the fix is CalMag either way though o_O

Possibly a slight magnesium deficiency, but I wouldn't take any action yet. See if it heals itself.

Check your pH too

The leaves appear to be yellowing from the bottom up, which leads me to believe it's probably a nitrogen problem. Maybe add some nitrogen and prune those yellow leaves.

I had rehydrated the cubes with RO water and a very weak nutrient solution. 160ppm, GH Trio, 1/2tsp per 5 gallons.

I have 5 seedlings in rapid rooter cubes. They broke the surface about 3.5 days ago. The cotyledons look a little dark and the true leaves dont seem to be developing well. I think the cubes were too moist to begin with, but they seem to have a good content now. In the photo where you see only...

THANKS! I was thinking along the same route.

I'm on my first grow. Germinated 5 seeds and one came out like this.