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Thanks fatboyOGOF, you have a similar setup to mine. I'm hoping to pull a pound?

What should my goal be for yield with my set up? 600 Metal Halide for Veg./ 600 HPS for flower 4 1/2 x 4 1/2 ft. Tent 6" vortex Fan 80F 30% Day 60F 50% Night 2 gallon pots - 25 Plants (5 rows of 5) MyGreenPlanet nutrients. Strain - VISC Titanium I have plenty of air flow and good water. Any...

how much are you guys yielding of one 600 hps? how many plants? how long did you veg? what size pots?

What should my goal be for yield with my set up? 600 Metal Halide for Veg./ 600 HPS for flower 4 1/2 x 4 1/2 ft. Tent 6" vortex Fan 80F 30% Day 60F 50% Night 2 gallon pots - 25 Plants (5 rows of 5) MyGreenPlanet nutrients. Strain - VISC Titanium I have plenty of air flow and good...

Looking good I wouldn't be worried. Is there much of a difference from day temps to night?

Its a loong story but I think I got this all figured out. Day 75F, 45% Night 57F, 60% Will I pull through and be ok?

By putting the exhaust back into the tent it is the light that is doing the heating. i have a enclosed light shade. air flow goes like this. carbon filter>light>vortex fan>outside tent than back in to warm the place up. does desiccant work well at lowering humidity?

thanks you two guys but my concern now is humidity. 67% day and 97% at night!! this can't be good there is condensation on the walls of the tent, Im afraid of mold. I hear a bowl of kitty litter is a good cheap desiccant if I put that in my tent in front the exhaust that will lower the humidity...

Ok guys new problem! I ran my exhaust back into the tent so now my day time temps are 78F :) night time temps still drop to 53F but a small space heater on at night will fix that very soon. BUT! since i started running my exhaust in my humidity has gone through the roof!! 67% during the day and...

Ok thanks for all the wisdom brick top. My temps are almost in order. I should of got temps in order long ago I was slacking.

The leaf in the second pic is curled down kinda has a claw thing going on? Its not thaat bad.

Sounds about right. Ok so the first pic is do to a phosphorous deficiency which is caused by the low temps I almost have the temps right so that problem is just about solved. What about the second pic?

On a side note besides the slow growth what is the cause of these problems with these two leaves??

51F was only last night. There was a two week period it was getting down to almost 40F :(

Thank you I now have hope. I know I definitely have no light leaks and Im on 12/12. Im getting my temps fixed and hopefully this grow works out.

Thanks robert. Yes the plant are deep purple this round I think its because of the temps. I ran my exhaust back into the tent and its up to 70F during the day but it still fell to 51F last night. I need a small space heater but my main concern is running up my electricity bill.

Ok one last question. If I get my temps right some how by tomorrow will my plants recover and swell up? They will be 8 weeks flowing in a few days, or are they getting too old and will dye after a certain amount of flowering time?

Either nute burn or a magnesium deficiency both problems look almost identical, I think you have nute burn. It may have also been caused from the foliar feeding possibly? I say flush for a week and then go back to your regular nute schedule. But im still a rookie.

If I redirect my exhaust back into the tent and get day temperatures back to normal (70-80F ??) my night temps will still be 50-55F will the huge fluctuation in temps be a major problem?

I have a 6" vortex fan pulling in massive amounts of fresh air from outside keeps my tent and light super super cool. Im sure my low temps are killing me. I thought about that but night night temps would be the same and the fluctuation from day temps to night would be huge.