So there was quite a bit of new info for me again in your post, bobrown. I thought the filter has to be connected to the fan, I only saw it this way so far. Well, common sense says that it can, of course, filter the air if it's just sitting at the bottom, but I never really imagined it not being connected to the fan. Anyways, if this tent will be sturdy enough, I'm going to hang it from the top, connect it directly to the fan, and then a shorter pipe to the fan, leading the air out. If it's not that sturdy (in which case, I'll be a bit disappointed
), then I guess I will have to make it sturdier
Now, the bad news for today.
I got home about an hour ago, went to examine the little one. I forgot to mention it yesterday, but she was already stretching quite high. I put a lot of boxes on a table and put the cup on top of it. It was done to get her quite close to the room's "main" light and I also put the small desk lamp onto the boxes, she was getting light from two directions, from quite close distances. The stronger lamp was about 30cm above her, and the desk lamp was even closer. I did it yesterday, then when I got home today, all I could see that her leaves haven't got bigger, not even by a milimeter, and the plant kept stretching. At this moment I lifted the cube
for the first time to see if there's any sign of her roots reaching the surface of the cube. God, I wish I made it earlier. Her tiny little root was twisting all around the bottom of the cup like a worm. I put her back and immediately started mixing my lightmix soil with some perlit. She got transplanted to her new (and final) 15l pot in 5 minutes, but she was already drooping a lot. I guess I stressed her by lifting the cube and putting it back to the cup, onto a surface where the root had nowhere to grow. All in all, she is now in the large fabric pot, I gave her fresh water and put her back under the lamps. I'm sure she will survive, but I might stunted her quite much with this action.
I'll upload a few pics tonight. I know this journal would be much more interesting if you could see pictures about what I'm talking about, my only problem is that my cellphone has a shitty camera, so I make the pictures with a Nikon DSLR. I have to take the SD card out, and copy the pictures from it to my computer. This, of course doesn't take more than 3 minutes, but I'm a bit lazy sometimes
I'll check back later!