Autoflower CFL Mini Grow

This week has been a bit challenging. The grow tent got crowded, I underestimated their growth and the LST sure helped with them growing so bushy. Next time probably I'll grow only two. In a way the Auto Chronic being growing so slow may be an advantage in this situation. 😅 This week I noticed some of the lower leaves of the Northern Light and Jack Herer are looking bad, more on the NL and some JH leaves look a bit strange with some leaves having burned tips. Unfortunately I don't have a ph meter, so my best guess is one or more of these problems: nutrient lockout, ph imbalance and nutrient burn. Initially I thought it may be some deficiency, but I'm pretty sure I fed them enough. This may have been caused by not watering them properly, feeding them constantly without doing a proper runoff and not watering them with plain water from time to time. The day before taking the pictures I did a full flush and I'm waiting until the soil is dry enough, then start feeding with a lighter mix. Fortunately it looks that mostly older and lower leaves which don't get much light are affected, so in the end I think they'll be fine, but I'll be more careful from now on. 😬 Another thing I noticed this week where some tiny flies, probably gnats, just 2 or 3 I think, probably they migrated from my windowsill house plants. I put a layer of perlite on top of the pot to prevent them from nesting, but I noticed that they where going in the holes from the air pot, this being my first grow with air pots I didn't expect this. So I tried to catch the flies and then I sprayed the side of the pots with soapy water and covered the pots with some socks. It should be fine from now on, but I'll keep watching for flies.👿 The Auto Chronic still don't show any sign of flowering. It has grown a bit more, but not much. It has some shinny spots on some lower leaves, but from what I know that's from those pesky gnats.😩