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Hi Grorite. I'm using 4 T5's 6500k. I can go with all 8, going to try that this weekend one day when I'm home. Don't forget they were regressing for 10 days of that instead, of progressing. Due to very low humidity. I think since I figured that out they are showing normal progress. I'm trying...

UPDATE: Here they are at just over 1 month, this is the progress of the last 8 days. Fed 4 days ago w/aerated tap water with calmag 1/2 strength. Fed this morning with 1/2 strength GO box aerated tap water. PPM's were around 450. Did not PH, Found out the hard way you cannot use a liquid PH...

I really like your cabinet I have the makings of something similar. Your last, my first.... May I ask what you are using for raising humidity? Fogger? And do you have something to automatically control humidity? or is is manual or timed depending on the conditions, etc.??? I should post mine...

I have a few large bowls of water, one with a fan blowing down at the water. Brings my humidity up to around 50%.

Just about what I needed. I tested quite a few fans. Out of Vortex, Can, that expensive on that starts with a L (i think), and an economy one, the Vortex 4" is THE quietest fan at less than full speed. At full speed it was louder than some but I wanted less than full speed operation, and as...

Here are the pics. These are from a few days ago now. I'm wondering when I can start introducing nutrients ??? I have a GO box and also the AN 3 part grow-micro-bloom. Not sure what I want to use yet, GMB was a gift from a friend. I was thinking of using GO box but using AN's GMB instead of...

Bump. Alright 11 days later, they're looking pretty good..???. 3 + sets of leaves. I believe this is normal growth now. Thanks for all who have provided advice. The roots were starting to wrap , so I re potted w/ Happy Frog & 33% Perlite. Temps maintaining 78-82f daytime, RH 45-50%...

+1, cupping up... What lights? How close?

Put the fans down as low as possible, directing air upward toward toward the light. Air should flow into the area low, to up underneath the plants, and then be swept to the light and then to the filter. I'm not familiar with that exhaust fan and it's cfm ratings at various tubing lengths, but...

1 foot above with 400w and no air is going to fry a seedling. I'm sprouting (2 to 3 weeks above ground) and I'm about that high with t5s. I also use a few pc fans to move the air around and my cabinet is pretty small . Right now if I put the t5s any lower the sprouts shy away. You have much...

Yeah it's about 2x2x7, more like 3x1.5x6. I'm using t5's right now but I'm thinking of going with a 400w hps separate cooltube of course. The problem I'm having is too much ventilation. On the lowest speed that my 4" vortex will self start, I suck the air out once every minute or so, a bit to...

I've seen a lot of posts from people saying they don't even run their ventilation at night. I don't see how pulsing the exhaust at night like you plan wouldn't be a win-win for you. Temps and co2. I'm on a micro scale compared to yours but I've been having similar issues, and am doing a similar...

Unless it's low 20% or less I think you'll be fine...

I'm at the same stage as you pretty much, maybe a week forward. I also have an 8 banger t5 (2'). I have only 4 lights on. 12" above the plants. Any lower or more lights and they shy away and droop. I have fans blowing around, but I only run my 4" inline for a couple minutes, 4 times per day...

Around 20-23% my seedlings almost died. Everybody thought it was over-watering but I knew better because I wasn't watering very often. Now I'm keeping my cabinet at around 45-50% RH and they are doing great. So don't have it too low or you could have problems.

Update I had some problems with humidity being too low. I'm in the basement, and can't run my 4" vortex on low continuously with these little guys. Not knowing this, I lost about 10 days of progress. The babies basically did nothing but grow a tiny little bit and droop. So to help them I stopped...

Ha, 12 hours. Thats nothing i think i check on mine every 12 minutes. Really every hour or so. Shit i check them on my phone when im working. Yeah i need help....

Just an update they are doing freaking awesome today. #2 just exploded today. Four new baby leaves. I didn't get the RH above about 41% lights on today so I'm trying a fan blowing on the water as you suggested. It's at 40 and rising already. Every time I open the cabinet it plummets to the low...

I'd go with the 6" and a speed controller to fine tune.

Just wanted to update this. Thanks for the offer ClosetGardner. So I've been dealing with this for a few days now, the plants were growing very slowly, if any. And they both started drooping, one very badly. No water condition, dry to moist, is any help. During my last post, I bought a heat...