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The problem is not getting any better. Could it possibly be heat burn from the light? They have done fine at this distance, but maybe they get more sensitive with a litle nute burn?

Cool, I'll check the soil pH on my next watering - in about 2-3 days. Any advice on exactly what to do? Should I lay off the nutes for another cycle and just keep flushing?

Ph is in the mid to high 6's, so that shouldnt be an issue. Plus, i let my water sit out for at least 2 days, so it should be balanced. I dont know the soil ph- my tester doesnt do shit

This is an indoor grow, under a 150w HPS, I've been watering every 7 days for about 3-4 weeks at least (adding 1/4 to 1/2 strength nutrients every 2 weeks/waterings). The medium is potting soil, humus, and vermiculite. The older plant has been in 12/12 for 13 weeks and the younger plant has been...

I am doing alright with the light, but i need to add some black legging material to help with that, and filter the air too. At some point i should spray the insides of the pvc black. Daniels- i got some buds in there now, that should be ready to cut in a couple weeks- i'll update my journal...

The monster exhaust system is finally in, although needs a lot of detailing. I am really happy with how well it fit in the cab. The setup works great, with the first test of the [530cfm] fan turned down to about 40%, I'm running at +4˚to +5˚F, which is much much better than the 4...

Hey man, I really appreciate this thread! So my baby was vegged for 30 days, and has been under a 150w HPS @ 12/12 for 85 days and has 72 days since showing pistils. It seems to be dragging on like hell - but its a strain called "atomic haze" that has some super silver haze in it, so prob not...

Thanks man. I hope everything works out as planned! I'm getting everything together so I can have the high speed fan going in about a week. EDIT: The fan controller is working great, so the super-exhaust is near. Just gotta line the exhaust box with some acoustic foam I bought and finish the...

I'm going to buy one of those filter pads from the pet store and wrap it around the intake tube, when i get the high power exhaust system set up. well, I keep on adding black silicone to the edges to stop the light leaks, which is working well. As of now, the light leaks are very minimal...

Hey stelthy, thanks for stopping in. Actually, I read through your entire thread when I started designing, in part of the research I was doing. I learned a lot from the different ways you tried exhaust systems (if I'm remembering the right thread) and how you dealt with length, vibration...

I gotta get some of those grabber latches, because my plywood door is a bit warped and one corner isn't closing. For my passive intakes, I'm using 10mm pvc pipe with a couple of turns. I built some intakes like yours, using cardboard, and they worked fine, but I didn't think the airflow was...

The project was started on saturday, and is still continuing. The box is fully together, still working on light control (had to put the plants in large black plastic bags for their 12 hrs of sleep the last 2 days, but that is over now - i put a remote in there, and it got up to 91% humidity. The...

well, the cab just went under some pretty heavy redesign. There is a cool little nook in my new apt that I want to fit it in, so it had to get a lot skinnier. Luckily, the nook has some depth, so basically the grow rooms were rotated 90˚ to be deep and skinny, instead of wider and...

hey - hows the cabinet going? I'm about to start construction on a cab this weekend. Are you up and running? I ran across this thread looking for door light proofing options - did yours work out?

nice man. Well, i'm always scheming on high optimization, performance, etc, haahh - - sometimes simplicity is the key. Well, I'm looking forward to see how our 2 systems work - it would be cool to see 2 different working ways of multi-space exhausting. If you know of any other threads that try...

nice, congrats on the successful build! I'd really like to see some pics of it. I'm getting started on a cab this weekend, and I modeled it as well. (always great to make it 'digitally' before 'physically', huh??) Glad to hear you still got decent air movement with the fans close to the wall

Ok, cool. I was planning on putting some ONA gel in the foam-lined chamber where all of the exhaust is going. I need to control the smell, but it doesn't need to be 100% perfect. (in all likelyhood, i'm sure i'll have to do some modifications later) I'm moving into a 1 br apartment this weekend...

hard to read your sketch -- - Try drawing a top view of it and then a side view looking at the 9' long side, and one looking at the 3' long side. If you could draw by hand and scan it, that would prob work better. I've done a lot of ventilation research, and would like to help, but just upload...

What about putting the PSU in between the plants, to spread them out a bit more under the lights? I would also bump the intake fans up higher, it would be much better to have at least one blowing across the lights. In fact, if size allows, I would do 3 outtake fans on one side and 1 intake fan...

hah, well, i'm one step ahead of you, man! Not only did I assemble the whole thing in the store a few weeks ago, I was extensively measuring every piece, so in the 3d model, it is the actual size. People were definitely giving me weird looks. Well, I've definitely thought a lot about this...