First Timer 2x2x4 Tent

Just water this week as my two FBR plants recover from nute burn and also begin to flower, GSC is getting tall and really is packing on some size for preflower, catching up to the FBR #2 plant. Ive been getting a lot of fungus gnats in my soil so I sprayed all of the plants foliage/soil with hydrogen peroxide/water solution and also added some perlite to the top soil to help the plants breathe some. The nute burn got pretty Nast on FBR #1 so I cut off most of it's big feeder leaves which were effected the most, along with some toasty smaller leaves - just want to see what effect removing the damage will do compared to the FBR #2 plant which I am not touching. My girlfriend has a bond with FBR #2 so she hasn't let me do any sort of LST or defoliation or "experimental" stuff to this plant hahaha besides the cat munching a couple leaves, which probably explains why is has out grown all the other plants. I forgot to mention, I topped the Zkittles OG as an experiment and it has reacted pretty well, but I was separating the two top branches with ties and I snapped one, resulting in a duct tape bandage. It seems to be recovering but the other branch is already so much bigger haha. Overall tho for a first grow I think it was beneficial that I've been pretty spontaneous in my training methods and nutrient feedings, the mistakes and reactions of the plants has taught be a lot and I already feel so ready to start my next grow. Another thing about this grow in that 4 plants just feels a bit crowded in the 2x2, but they are all in 3 gallon pots. I will probably just grow 1-2 plants in this tent in the future and now that spring in coming I will plant some more auto flowers on my balcony, and I will likely try out some Photoperiods in my grow tent. Ethos might be my next move. I really like 420FastBuds but I have a slight feeling that because they focus so heavily on auto flowers the genetics of their strains might be slightly more unstable than other brands or photoperiod strains, resulting in some variety between phenotypes. But I am only a first time grower and could say nothing bad about my experience with their genetics. But this is what I feel may be the case.