Hey Q,
I've got a grow journal where I use LED, and my tent looks a lot like yours. Here's the link; it might be helpful. You won't make my mistakes anyway.
https://www.autoflower.org/f44/lowryder-2-grow-seed-smoke-19648.html
I was growing Lowryder 2 at that time. Oh hey! Where did you get those fans??? That's awesome. I've got similar sized fans, but they are taking up floor space in my tent. I've never seen ones that mount like yours. I gotta get some! Where?
Currently, I'm growing my own f1 hybrid of Lowberry and Auto AK 47. Still too young to tell how they will turn out, or if they will have retained some berry smell. The Lowberry is Dutchbreed's cross of Dutch Passion Blueberry and the Joint Doctor's Lowryder. So my Lowberry is probably a lot like your Dutch Passion auto blueberry. One of my Lowberry was an awesome phenotype that smelled strongly of berry.
I grew my Lowberry is a soil-less mixture called Sunshine Mix #1. I didn't add a thing, other than half strength fertilizer. My reading says that all the blueberry plants are nute sensitive. So fert lightly.
As far as going organic or not, I don't see that it matters much in an autoflower. I garden organic, like vegetables, fruit, flowers in the yard, but that's because I want quality soil that is alive and getting better over the years for planting crop after crop. With 70 days or so with an autoflower, I don't see that it matters. You really don't have enough time to get all the micro organisms living and doing their thing. Chemical fertilizer just makes food more readily available to your plants. Just my thoughts. Although I do use organic with my autoflowers, mostly because it is more forgiving and less likely to burn. Oh, and I've always done a light cycle of 20/4 with good results. Hope some of this helps. So about those fans.....
Cheers!
Hey Alaskan1, thanks for dropping by and leaving a comment..advice is much appreciated...i will be checking out your journal very soon...As for the fans, you can get them in a hydroponic store or at Amazon.